Leach Inc. Wins VoiceOS Award at International Hackathon "Builders Weekend 2026 Tokyo" | Develops Voice AI x Generative AI Language App in 48 Hours

Leach Inc. (Headquarters: Minato-ku, Tokyo; Representative Director: Takuya Tominaga; hereinafter "the Company") is pleased to announce that a team including our representative, Takuya Tominaga, received the special "VoiceOS Award" from the Mac voice input app VoiceOS at the international hackathon "Builders Weekend 2026 Tokyo," held from March 20-22, 2026, at PARCO Shibuya 18F in Tokyo. During the 48-hour development period, they developed and presented a prototype of "MissionLingo," a language learning app that uses AI voice role-play to train "survival language skills in that country." This is a presentation of results from the hackathon, and there are currently no plans to sell MissionLingo as a commercial product.

▼Pitch Video: https://youtu.be/wu_SdmmAyHw / ▼Live Demo: https://real-deal-lingo.lovable.app / ▼GitHub: https://github.com/leach-mrt/mission-master-japan / ▼Our Official News: Award Report

Award Summary

Award Event: Builders Weekend 2026 Tokyo (International Product Hackathon / First held in Japan, March 20-22, 2026 / 48 hours)

Venue: PARCO Shibuya 18F, Tokyo

Participation Scale: 205 builders from over 15 countries worldwide participated

Award: VoiceOS Award (Special Award from Mac voice input app VoiceOS Inc.)

Award Team: Takuya Tominaga (Leach Representative / Product) / Tan Phat Ng (Full-Stack & AI) / Alain Mimeault (Engineering / Canadian English Teacher)

Developed Product: AI Language Learning App "MissionLingo" Prototype (14 Japanese missions x 3 branches) *Hackathon deliverable. No commercialization planned.

Key Technologies: OpenAI GPT-4o / ElevenLabs / Digital Garage Payment Platform SDK / RevenueCat / Lovable / Next.js 16

What is Builders Weekend? ── An International Product Hackathon Touring the World

Builders Weekend is an international hackathon that tours major cities worldwide such as San Francisco, New York, and London, characterized by its format of creating product prototypes in 48 hours. This Tokyo event was the first to be held in Japan, with Digital Garage serving as the main sponsor, and Lovable / VoiceOS / Supercell / RevenueCat / ElevenLabs participating as partners. 205 builders from over 15 countries worldwide gathered. The judges were Mitsumasa Kiyohara (Open Network Lab), Jerry Chi (Supercell AI Lab), Yoshi Ueda (RevenueCat), and Kai Brokering (VoiceOS).

What is the VoiceOS Award? ── An Award for the Team That Made the Most Extensive Use of the VoiceOS Voice Input App

VoiceOS is a native voice input app for Mac that allows highly accurate text input by simply pressing the fn key and speaking. It provides a next-generation input device that replaces developers' "typing time" with voice, for everything from coding and Slack to document creation.

The "VoiceOS Award" is a special award given to the team that made the heaviest use of VoiceOS during the development period. Unlike general awards that compete for product innovation, its evaluation criteria focus on "how deeply VoiceOS was integrated into the development workflow itself," and was judged by Kai Brokering, CEO of VoiceOS Inc.

Our representative, Tominaga, processed almost all tasks, including coding, prompt creation, pitch drafts, and internal team Slack, using voice input during the 48-hour hackathon. He completed the development having "used VoiceOS so extensively that he doesn't remember typing on a keyboard," leading to the team's award. This award case can be said to embody a new development style where "builders in the AI era move their mouths before their fingers."

Developed Product "MissionLingo" ── Training "Survival Language Skills in That Country" Through AI Role-Play

"MissionLingo," developed at this hackathon, is a prototype based on the concept of acquiring language by simulating real-life situations encountered in overseas living through voice role-play with AI characters. The theme is "sentence