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Yellow Blue Inc.

Category: Natural Language Processing

Tokyo-based AI startup building Blue One, a professional-grade AI translation platform for legal, medical, and corporate documents with context-aware translation and layout preservation. Yellow Blue Inc. was founded in 2025. The company is led by Rei Kuroda. Based in Setagaya-ku, Tokyo, Japan. Team size: 1-10. Total funding raised: $440K. Latest round: Seed. Key investors include mint Inc. (lead investor).

Founded
2025
Headquarters
Setagaya-ku, Tokyo, Japan
Team size
1-10
Total funding
$440K

Value proposition

Blue One provides professional-grade AI translation that goes beyond sentence-by-sentence translation by understanding the entire document context (DeepContext AI), preserving original document layouts (PowerPoint, Word, PDF, Excel), and maintaining terminology consistency — reducing post-translation editing work by up to 90%.

Products and solutions

Blue One — next-generation AI translation service for professionals. Features: DeepContext AI engine for whole-document understanding, layout-preserving translation for PowerPoint, Word, PDF, Excel, and images, 28 languages supported, terminology consistency across hundreds of pages, ready-to-present output requiring minimal post-editing.

Unique value

Only AI translation platform combining deep document context understanding with visual layout preservation for professionals, eliminating the "last mile" of manual reformatting after translation.

Target customer

Legal professionals (lawyers, patent attorneys), medical professionals (researchers, healthcare), corporate professionals (trading houses, consulting firms, manufacturers), researchers and academics working with multi-language documents.

Industries served

Legal, Medical/Healthcare, Corporate/Enterprise (trading, consulting, manufacturing), Research/Academia

Technology advantage

Proprietary DeepContext AI engine that analyzes entire document context rather than sentence-by-sentence; visual structure understanding for layout preservation; claimed highest translation accuracy vs. other tools/generative AI (self-evaluated 92.8/89.6 points); aims for "AI Translation 2.0" paradigm.

How they differentiate

Unlike generic translation tools that process text sentence-by-sentence (leading to broken layouts and terminology inconsistencies), Blue One's DeepContext AI understands the entire document, preserves visual layout, and maintains domain-specific terminology — delivering ready-to-present materials that reduce post-editing work by up to 90%.

Main competitors

DeepL, Google Translate, Smartling

Key partnerships

mint (seed investor), Anthropic (CEO's prior venture Orange Inc. was featured as Anthropic customer for AI translation)

Notable customers

Major Japanese trading houses (shōsha), consulting firms, manufacturers, medical coordinators, law firms, automotive engineers

Major milestones

August 2025: Company founded, November 2025: Blue One beta release, April 2026: ¥70M (USD $440K) seed funding led by mint Inc.

Growth metrics

Claims up to 90% reduction in manual translation workflow hours (self-reported); claims highest translation accuracy scores among competing tools (self-evaluated 92.8/89.6 points)

Market positioning

Positioned as a premium B2B vertical AI solution for professionals who need "ready-to-present" translation quality, bridging the gap between free/consumer translation tools (Google Translate, DeepL) and manual professional translation services.

Geographic focus

Japan (primary), expanding into English-speaking markets

Patents and IP

Proprietary "DeepContext AI" engine (no publicly listed patents found)

About Rei Kuroda

Ex-Sumitomo Corporation; Ex-Dream Incubator; Ex-VP of Product / Head of International Business at Orange Inc. (manga localization startup); Keio University graduate. Previously led AI-powered manga translation using Anthropic's Claude, featured in MIT Technology Review and Anthropic customer stories.

Official website: