About Us

Built by engineers, for engineers

方晶株式会社 (Crystal Cube Inc.) is a Kanagawa-based software company dedicated to making database work faster, clearer, and more enjoyable for developers worldwide.

Our story

Our story

方晶株式会社 was founded by a small team of backend engineers who were frustrated with the state of database tooling. Existing clients were either too heavyweight for daily use or too minimal to handle the complexity of modern multi-database environments.

We started building PilotKit as an internal tool. Within six months, colleagues at other companies were asking to use it. We decided to turn it into a proper product — one that respects the developer's time and works the way they think.

Today PilotKit is used by developers across dozens of countries. We remain a small, focused team. Every feature we ship is something we use ourselves every day.

Established2025-02-12
HeadquartersKanagawa, Japan
Corporate No.2021001084433
Crystal Cube team at work

What we believe

Our values

Speed first

Every interaction should feel instant. We obsess over startup time, query latency, and UI responsiveness.

Focused scope

We build database tools and nothing else. Depth over breadth — we would rather do one thing exceptionally well.

Privacy by design

PilotKit runs entirely on your machine. Your credentials and query history never leave your device.

Craft matters

We care about the details — keyboard shortcuts, syntax highlighting, error messages. Good tools feel good to use.

The team

The people behind PilotKit

Fang Jing (方晶)Founder & CEO

Former backend engineer at LINE and Mercari. Obsessed with databases and developer experience.

Kenji HayashiLead Engineer

10 years building developer tools. Maintainer of several open-source database libraries.

Yuki TanakaProduct & Design

Believes great software is invisible. Focused on making complex workflows feel effortless.

Sora NakamuraEngineering

Specialises in query parsing and execution plan visualisation. Contributor to the PostgreSQL ecosystem.

Contact

Get in touch

For business inquiries, press, or partnership opportunities.

hello@crystalcube.jp
〒257-0003神奈川県秦野市南矢名2223番地の4東海ビル201BTokai Bldg. 201B, 2223-4 Minami-Yanna, Hadano-shi, Kanagawa 257-0003, Japan
法人番号 2021001084433

Try PilotKit free

30-day full-featured trial. No credit card required. Available for Windows, macOS, and Linux.