Tenders/Public Competitive Tender Announcement for Maintenance Work of Historical Site Kofu Castle Ruins Stone Walls
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Public Competitive Tender Announcement for Maintenance Work of Historical Site Kofu Castle Ruins Stone Walls

Auto-translated from Japanese
Original title: 史跡甲府城跡石垣維持管理業務委託の一般競争入札公告
山梨県
Published: Sep 10, 2026
Updated: Sep 14, 2026
Source: jp_kkj

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About This Opportunity

This is a consulting contract in the construction and civil works and culture and heritage sectors, with a focus on Rehabilitation, Demolition and Museums. Located in Japan, Asia, this opportunity is open to firms and consortiums.

Published through 官公需 (kkj.go.jp), a national government procurement portal. Public procurement tenders follow the country's national bidding regulations and may have specific eligibility and documentation requirements for consulting in the construction and civil works sector. Consulting assignments are typically evaluated with a strong emphasis on the technical proposal, including the methodology and qualifications of key experts. Shortlisted firms may be invited to submit financial proposals in a second stage.

Description

Auto-translated from Japanese
Bid Announcement for Maintenance Work of Historical Site Kofu Castle Ruins Stone Walls The contract for the maintenance work of the historical site Kofu Castle ruins stone walls, to be commissioned by the Yamanashi Prefectural Museum of Archaeology, will be conducted through a public competitive tender, and we hereby announce this in accordance with the provisions of Article 167-6, Paragraph 1 of the Local Autonomy Act Enforcement Order (Showa 22, Cabinet Order No. 16). September 10, Reiwa 8 Deputy Director, Yamanashi Prefectural Museum of Archaeology, Junichi Taniguchi 1. Matters for Public Competitive Tender (1) Name and Quantity of Contracted Work: Maintenance Work of Historical Site Kofu Castle Ruins Stone Walls, 1 set (2) Specifications of Contracted Work: As defined in the tender explanation document and specifications. (3) Contract Period: From the date of contract to March 19, Reiwa 9 (4) Place of Delivery: Marunouchi, Kofu City 2. Eligibility for Public Competitive Tender (1) Persons who do not fall under the provisions of Article 167-4 of the Local Autonomy Act Enforcement Order (Showa 22, Cabinet Order No. 16). (2) Persons who have not filed for commencement of rehabilitation proceedings based on the Corporate Rehabilitation Act (Reiwa 14, Act No. 154) or commencement of civil rehabilitation proceedings based on the Civil Rehabilitation Act (Reiwa 11, Act No. 225) (excluding those for whom a decision to commence rehabilitation proceedings or civil rehabilitation proceedings has been made). (3) Persons who are not members of an organized crime group as defined in Article 2, Paragraph 6 of the Act on Prevention of Unjust Acts by Members of Organized Crime Groups, etc. (Heisei 3, Act No. 77) (hereinafter referred to as "members of organized crime groups"), or, in the case of a corporation, whose officers are not members of organized crime groups. (4) Persons registered in the Yamanashi Prefecture List of Bidders for Goods, etc., as stipulated in the "Qualifications Required for Bidders for Goods, etc." (March 8, Reiwa 3, Yamanashi Prefecture Notice No. 67). *Inquiries regarding matters related to the qualifications required for participating in competitive tenders and submission of application forms: Postal Code: 400-8501 (Address) 1-6-1 Marunouchi, Kofu City, Yamanashi Prefecture (Institution Name) Yamanashi Prefecture Treasury Bureau, Management Division, Procurement Section (Phone Number) (055) 223-1395. (5) Persons who have been subject to bid suspension measures based on the "Yamanashi Prefecture Measures on Bid Suspension, etc. for Contracts Related to Procurement of Goods, etc." (April 1, Heisei 10) from Yamanashi Prefecture during the period from the date of bid announcement to the date of bidding. 3. Bidding Procedures, etc. (1) Location for Inspection of Contract Terms, Delivery of Tender Documents, and Inquiries: Postal Code: 400-1508, 923 Shimonegō-cho, Kofu City, Yamanashi Prefecture. Yamanashi Prefectural Museum of Archaeology, General Affairs Division. Phone: 055-266-3881. (2) Method of Delivery of Tender Documents: From the date of this announcement until 5:00 PM on Thursday, September 17, Reiwa 8, daily from 9:00 AM to 12:00 PM and from 1:00 PM to 5:00 PM, at the delivery location specified in 3.(1), or by email. If you wish to receive the tender documents, please contact the person in charge by phone and specify whether you prefer paper or email delivery. (3) Method of Submission of Bidder Qualification Confirmation Form: Submit by hand to the location specified in 3.(1) from the date of this announcement until 5:00 PM on Thursday, September 17, Reiwa 8. However, this is available daily during the above period from 9:00 AM to 12:00 PM and from 1:00 PM to 5:00 PM. (4) Date and Time and Location of Bidding and Opening of Bids: 10:15 AM on Thursday, September 24, Reiwa 8. Fudoki-no-oka Training Center, Training Room. Postal Code: 400-1507, 1271 Shimokawayama-cho, Kofu City, Yamanashi Prefecture. (5) Bidding Method: When determining the successful bidder, the bid price will be the amount obtained by adding 10/100 of the amount written on the bid form to the amount (if there are fractions of less than 1 yen, such fractions will be rounded down). Therefore, bidders must write the amount equivalent to 100/100 of their estimated amount on the bid form, regardless of whether they are taxable or non-taxable for consumption tax and local consumption tax. (6) Invalid Bids: Bids made by persons who do not have the eligibility for public competitive bidding specified in this announcement, bids made by persons who violate the bidding conditions, bids made by persons who fail to fulfill the obligations required of bidders, and other bids that fall under any of the items in Article 129 of the Yamanashi Prefecture Financial Regulations (Showa 39, Yamanashi Prefecture Ordinance No. 11; hereinafter referred to as "Regulations") shall be invalid. (7) Method of Determining the Successful Bidder: The successful bidder will be the person who submitted the lowest valid bid within the range of the estimated price determined in accordance with the provisions of Article 127, Paragraph 1 of the Regulations. 4. Other (1) Language and Currency to be Used in Contract Procedures: Japanese language and Japanese currency. (2) Bid Bond: Exempt. (3) Contract Deposit: Persons intending to conclude a contract must pay the contract deposit specified in the tender documents. However, those who fall under the provisions of Article 109-2 of the Regulations shall be exempted. (4) Requirement for Contract Creation: Required. (5) Penalty Clause: Yes. (6) Minimum Restriction Price: None. (7) Advance Payment: None. 5. Other: Details are in the tender explanation document. Specifications Work Name: Maintenance Work of Historical Site Kofu Castle Ruins Stone Walls Work Period: From contract date to March 19, Reiwa 9 Work Location: Marunouchi, Kofu City Item: Specification: Quantity: Unit: Application (Design Work) Direct Costs: 1 set Meetings: Start, Mid-term (2 times), Completion 1 work Planning and Preparation: Preparation of work plan, data collection 1 work Joint Field Survey: 1 work Displacement Meter Installation: 10 locations Primary Survey/Inspection: Visual inspection of all stone walls (366 locations), including measurement of all gauges 1 time Summary of Primary Inspection Results: Visual inspection of all stone walls (366 locations), including measurement of all gauges 1 time Primary Survey/Inspection (Main Stone Walls): Visual inspection of main stone walls (233 locations) 3 times Summary of Primary Inspection Results: Visual inspection of main stone walls (233 locations) 3 times Displacement Meter Gauge Measurement: 22 locations + 3 new locations = 25 locations (19 gauges + 6 inclinometers) 3 times Compilation of Displacement Meter Gauge Measurement Results: 22 locations + 3 new locations = 25 locations (19 gauges + 6 inclinometers) 3 times Secondary Survey/Inspection: Detailed inspection of important sections (550 m2) 1 time Summary of Secondary Inspection Results: Detailed inspection of important sections (550 m2) 1 time Compilation of Stone Wall Repair Work: Detailed inspection of important sections (550 m2) 1 time Review and Inspection: 1 time Report Preparation: 1 time Direct Costs (Reports, etc.): 1 set Machinery Costs: Lift truck: 4 days Displacement Meter: 10 units Electronic Deliverables Creation Costs: 1 set Other Costs: 1 set Other Costs: 1 set General Management Costs, etc.: 1 set (Stone Wall Repair Work) Direct Construction Costs: Stone Wall Repair: 800 m2 Traffic Guidance Personnel: B: 7 days x 2 people/day 10 people Temporary Enclosure Installation/Removal: 20 m2 Common Temporary Facilities Costs: 1 set Site Management Costs: 1 set General Management Costs: 1 set In the event of changes required in this contract, the contract amount will be changed by multiplying the contractor's revised estimated amount by the bid rate. 1. Special Specifications for Maintenance Work of Historical Site Kofu Castle Ruins Stone Walls Article 1 Scope of Application 1. These special specifications apply to the maintenance work of the historical site Kofu Castle ruins stone walls (hereinafter referred to as "the Work") commissioned by the Yamanashi Prefectural Museum of Archaeology (hereinafter referred to as "A") to the contractor (hereinafter referred to as "B"), and general matters not specified in these special specifications shall be governed by the common specifications. 2. These special specifications supplement the common specifications. Article 2 Definitions of Terms "Inspection/Survey": Refers to the confirmation of the condition of existing stone walls, grasping their current state as historical structures, evaluating and judging their soundness, and managing and utilizing the records. The work is divided into primary and secondary inspections. The survey method is visual inspection, supplemented by measurements using measuring instruments to grasp abnormalities. "Repair": Refers to routine work such as removing surface peeling and compacting infill stones for stone walls that have undergone renovation or repair work. Referred to as "maintenance" by the cultural property side. Repair work involving replacement of infill stones, etc., is not included. "Renovation": Refers to work aimed at restoring stone walls damaged (collapse, bulging, deformation, etc.) to their original positions as much as possible by dismantling and investigating. This is not included in the current work. Article 3 Purpose of the Work The purpose of this work is to ensure the long-term stability of the stone walls as cultural properties and to preserve their condition by conducting necessary inspections, surveys, and partial repairs, and by recording them to carry out continuous maintenance. Article 4 Work Content 1. Inspection/Survey To grasp the current condition of the stone walls and identify abnormal areas, primary and secondary inspections will be conducted. The details of inspection methods and locations will be determined in the work manual. (1) Primary Inspection ① For "all stone walls (366 locations)" (Figure 2) within the scope of the historical site Kofu Castle ruins shown in Figure 1, conduct visual inspections once a year using the method based on external visual inspection as defined in the work manual. Stone walls excluding those used as stairs, gutters, or retaining walls from "all stone walls" are defined as "main stone walls (233 locations)" (Figure 3) and will be inspected separately three times. ② Record the inspection results in Form [Form 1-1] and evaluate them according to the criteria defined in the work manual. Among the "main stone walls", those located in important positions within the castle, relatively large in area, and showing significant deterioration, damage, or deformation are defined as "key watch stone walls (43 locations)" (Figure 4) and will be recorded in Form [Form 1-2]. ③ Inspection of stone walls by fixed-point observation. 2a. For the 160 measuring instruments (gauges I-IV, inclinometer plates) installed on the stone walls, measure them once a year using equipment such as a high-altitude work vehicle, similar to visual inspection. For "key watch stone walls (43 locations)", measure the 25 measuring instruments three times separately. b. The locations of the measuring instruments are shown in the layout diagram (Figure 5). c. Record the measurement results in Forms [Form 2-5] and evaluate them according to the criteria defined in the work manual. (2) Secondary Inspection ① Conduct a detailed inspection of defined stone wall sections, primarily through close visual inspection and sounding, and confirm the location and scale of deformed areas by a stone-laying craftsman, and save the records. ② Inspections will be conducted once a year using ladders, rope scaffolding, and high-altitude work vehicles. ③ Record the secondary inspection results in Forms [Form 6, 7], evaluate them according to the criteria defined in the work manual, and save them. ④ The inspection area is approximately 800 m2 of the stone walls around the Inari Kurumawa area (I-36, -37, -39, -61, -63, -65, -66, -67, -68, -70, -72, -73, -74, -76, -79, -80) (Figure 6). However, the inspection area may be changed based on the results of the primary inspection. ⑤ Based on the total score from the inspection results, classify the deformation evaluation into stages of 1: Safe, 2: Cautionary Progress, 3: Alert, and then determine the judgment classification for countermeasures. 2. Repair (1) Perform repair work on the target stone walls and save the records. (2) Conducted simultaneously with the secondary inspection. (3) The scope of work is the areas (approximately 800 m2) where compaction and removal are confirmed to be necessary for loose stones and peeling due to deformation, identified in the secondary inspection. However, the repair area may be changed based on the results of the primary inspection. (4) Repair work will be carried out using ladders, rope scaffolding, and high-altitude work vehicles. (5) Perform the following work according to the criteria defined in the work manual for the target stone walls and record it in Form [Form 8]. (6) Remove parts of the stone surface that are weathered/peeling and may collapse. (7) If movement is observed in the infill stones and they can be secured by compaction, perform tightening work using a hammer, etc. *Work aimed at restoring damaged stone walls (collapse, bulging, deformation, etc.) to their original positions by dismantling and investigating is not included. (8) Other ① When performing repairs, as the stone walls are extremely important cultural properties, workers engaged in the repair of castle stone walls must be at least specialized stonemasons. However, this does not apply to auxiliary workers working under the direction of a specialized stonemason or higher. Furthermore, workers must be skilled and fully understand the characteristics of the rough-hewn stone walls of Kofu Castle ruins. ② A specialized stonemason is defined as a person who has experience in the repair of nationally or prefecturally designated (including outside Yamanashi Prefecture) historical cultural property stone walls, possesses a considerable level of skill as a cultural property stone worker, and primarily performs work such as processing, repairing, reinforcing, stone laying or stone paving, infill stone work, and surface finishing. 3. Consult with the supervisor regarding any unclear points in the repair work. 4. Transport and stack removed stones at the designated location under the supervision of the supervisor. The supervisor will be present during repair work. Article 5 Management Engineer (Site Representative) The management engineer must be a holder of a Professional Engineer qualification or equivalent ability and experience, or a Civil Engineering Consulting Manager (RCCM) qualification, and must be fluent in Japanese. Furthermore, as these stone walls are cultural properties designated as national historical sites built in the early modern period in the 1590s, an engineer with experience in investigating and examining stone handling and repair methods must be assigned. The management engineer must be assigned on a full-time basis. RCCM... A private qualification administered by the Japan Federation of Engineering Consultants, which qualifies individuals to be management engineers and review engineers for civil engineering consulting work. Article 6 Review Engineer The review engineer must be a holder of a Professional Engineer qualification or equivalent ability and experience, or an RCCM qualification, and must be fluent in Japanese. Article 7 Labor Classification Conditions for Inspection/Survey Work The labor classifications for this work are as follows: Professional Engineer... A national qualification holder under the Professional Engineers Act. Engineer with equivalent ability and experience... An engineer with over 20 years of experience in design work. Article 8 Work Items 1. Planning and Preparation: The work plan must be submitted within 15 days after the contract is concluded, paying attention to the items described in these special specifications. 2. Progress Management (1) For maintenance work, create a work schedule based on thorough planning and manage the work progress (comparison of plan and execution, and work completion management). (2) As multiple events are held within the park, consider not hindering the events and consult with relevant parties as necessary. Article 9 Other 1. When performing each task, ensure thorough safety management. If temporary enclosures, etc., are to be installed, submit a layout plan in advance. 2. As it is a park visited by many users, traffic guidance personnel will be assigned as needed. 3. If permission for alteration of existing conditions, road occupation, or road use is required for any work, "B" shall prepare the necessary documents and submit them to "A", and "A" shall apply for them. 4. If permission for park use, etc., is required for any work, "B" shall apply. 5. Prepare materials for consultation with relevant organizations regarding inspection results and attend meetings as necessary (approximately once a year). 6. If any doubts arise, they shall be resolved through consultation with the supervisor.

Data provenance

This notice is sourced from 官公需 (kkj.go.jp) and was originally published on September 10, 2026. Last refreshed 6 days ago. Original language: Japanese. BidsFactory mirrors official procurement notices and links back to the source for full legal text.

About 山梨県

山梨県 has issued 100 procurement notices on BidsFactory, including 5 currently open and 1 awarded contracts. Activity concentrates in General Supplies & Services, Information & Communication Technology, and Construction & Civil Works. All notices are published for Japan. Notices are distributed via 官公需 (kkj.go.jp). Most recent publication: September 16, 2026.

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This notice was issued by 山梨県 in Japan. The authority is responsible for evaluating bids, awarding the contract, and managing performance.

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Key Details

Contract Type
Consulting
Eligibility
Firms / Consortiums
Language
Japanese

Source

jp_kkj
jp_kkj
Official Source

Contracting Authority

山梨県
🇯🇵Japan

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