Grabion株式会社
Tokyo, JP · 2 known investors
Grabion develops Propo Base, an AI-powered SaaS platform for public sector procurement that assists private companies with government bidding and proposal management, and helps government agencies improve specification writing and knowledge management.
Also known as Grabion Inc. · グラビオン
Founders & leadership
Investors · 2
Company profile
researched Aug 2026Grabion株式会社 (Grabion Inc.) is a Tokyo-based software company developing AI-driven SaaS for Japanese public procurement under the "Propo" product series. Its main product, Propo Base, is aimed at private companies that bid on central government and local authority contracts; it covers opportunity search, reading and interpreting specification documents, drafting proposals and quotations, and managing contract performance, with the stated goals of raising win rates and reducing manual workload.
A second product, Propo Base for Gov, applies the same technology to government and municipal staff. It targets the drafting of procurement specifications, aiming to reduce dependence on individual expertise and to accumulate related know-how in an organisational knowledge database. As of the company's site, Propo Base is in service and Propo Base for Gov is in proof-of-concept and under development.
The company describes its stated aim as improving the quality and efficiency of public projects on both the private and public side, positioning AI and SaaS as tools to digitalise the public procurement process. Registered capital is ¥1,000,000, and the company banks with Mizuho Bank, Sumitomo Mitsui Banking Corporation and GMO Aozora Net Bank.
Founding story
Grabion株式会社 was established on 14 April 2025 with the stated aim of creating mechanisms to maximise Japan's potential and strengthen its international competitiveness, applying AI and SaaS technology to the public procurement process. CEO 木村 晃久 handled government and municipal bidding at an advertising agency, later served as a sales director and set up a travel business and an overseas subsidiary before going independent in 2025.
Business model
Software-as-a-service products sold to private companies bidding on public-sector contracts, with a second offering directed at government and municipal organisations.
Traction
Propo Base moved from a beta release in November 2025 to general availability in July 2026; Propo Base for Gov is in proof-of-concept while still under development.
Latest developments
In July 2026 the company announced the launch of Propo Base, an AI service supporting the full workflow from public tender opportunity search to proposal and quotation creation.
▸Full profile — market position, technology, go-to-market, geography, history
Market position
Positions itself as a provider of AI and SaaS solutions for the digitalisation of public procurement in Japan, serving both the bidding side and the contracting-authority side.
Products are specialised for Japanese government and municipal tender work rather than general document generation, and the company offers paired tools for both bidders (Propo Base) and contracting authorities (Propo Base for Gov).
Technology
AI applied to public procurement workflows: searching for tender opportunities, reading and interpreting specification documents, automatically generating proposals and quotations, supporting contract performance management, and, in the government-facing version, assisting specification drafting and structuring related know-how into a knowledge database.
Go-to-market
Private companies that bid on central government and local government contracts, and government agencies and municipal staff responsible for drafting procurement specifications.
Geography
Headquartered at Miyamasuzaka Building 609, 2-19-15 Shibuya, Shibuya-ku, Tokyo 150-0002, Japan.
History
The company was founded on 14 April 2025 and is headquartered in Shibuya, Tokyo. Development of Propo Base for Gov, an AI support tool for government notice and specification drafting, began in October 2025. A beta version of Propo Base, an agent for creating proposals for government projects, was released in November 2025. In February 2026 the company's activities were covered by the startup media outlet BRIDGE, and in July 2026 Propo Base was made generally available as a service covering opportunity search through to proposal and quotation creation.
Compiled by commissioned research from 1 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Timeline · 4
launches, deals, and filingsGrabion began offering Propo Base, an AI service supporting everything from searching for public tender opportunities to creating proposals and quotations.
Grabion's activities were featured by the startup media outlet BRIDGE.
Grabion released a beta version of Propo Base, an AI agent specialised in creating proposals for government projects, stating that proposal drafting time is reduced from three days to 30 minutes.
Grabion announced the start of development of Propo Base for Gov, an AI tool supporting government agencies with public notice and specification drafting.
Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.
▸Research sources · 1
primary sources listed
- Grabion株式会社grabion.jp · web
1 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Grabion株式会社 do?
- Tokyo startup building Propo Base, an AI SaaS for public-sector bidding, proposal and quotation creation.
- Who founded Grabion株式会社?
- Grabion株式会社 was founded by 木村 晃久, 金岡 慧, 高山 慶介.
- Who are Grabion株式会社's investors?
- Grabion株式会社's investors include ANOBAKA, DG Daiwa Ventures.
- Where is Grabion株式会社 headquartered?
- Grabion株式会社 is headquartered in Tokyo, JP.