Connecting people and knowledge.
Preserving it for the future.
From Osaka, Japan, to the world. Bringing AI and technology closer to people.
- ProductOur first product: ConvoArk, a Chrome extension for saving AI conversations, which we provide and operate
- PrivacyConversation text is processed in your browser and not sent to external servers
- LanguagesAvailable in 4 languages: 日本語, English, 简体中文, and 繁體中文
What matters to us
Products: software people actually use
ConvoArk, available on the Chrome Web Store, saves your AI conversations in a single file, with formatting, math, and citations intact. We will keep adding tools that help with everyday work and learning.
AI and data: safe, and genuinely useful at work
Using AI tools, organizing and converting data, automating routine tasks: our aim is to make AI and software truly useful in day-to-day work.
Trust: transparent, honest operations
As an organization registered in Japan, we publish our address, corporate number, and privacy policy. ConvoArk is designed not to send conversation text to external servers, and this website uses no analytics.
JC H&E at a glance
All of these can be checked in public records or on public pages (as of October 2026).
- Established
- 2017
- Location
- Tennoji-ku, Osaka
- ConvoArk released
- October 2026Chrome Web Store
- AI services ConvoArk can save from
- 3ChatGPT, Claude, Gemini
Corporate number 8120005019561verifiable on the National Tax Agency's Corporate Number Publication SiteCorporate Number Publication Site (external site)
Product
ConvoArk
A Chrome extension that saves your ChatGPT, Claude, and Gemini conversations as a single HTML file you can open offline. Conversation text is processed in your browser and is not sent to external servers. As of October 2026, all features are free, with no usage limits.
Our technology in practice
Everything below is actually used in ConvoArk and on this website.
Browser extension
ConvoArk is available on the Chrome Web Store (since October 2026)
Processing AI conversation data
Save a conversation, with its formatting, math, and sources, as a single HTML file
Multilingual website
We create and run this site in four languages: 日本語, English, 简体中文, and 繁體中文
What can be saved depends on each AI service's specifications and other factors. See the Products page for details. Products
Careers
We are hiring one full-time Office Administration & Support Staff member. You will support the organization by handling phone calls, emails, visitors, and paperwork. IT experience is welcome.
Office Administration & Support Staff
- Employment type
- Full-time, permanent
- Location
- Tennoji-ku, Osaka (about 5 minutes' walk from Nippombashi Station)
- Salary
- Monthly ¥200,000–¥300,000
Starts at 9:00, no overtime as a rule, weekends and public holidays off | Office work at a small organization that also uses AI tools
News
- Posted our job opening on the Careers page.
- Launched our website.
- Released the ConvoArk Chrome extension on the Chrome Web Store.