Marsel Bait
Marsel Bait

I'm Marsel Bait, a product designer in Tokyo.

I ship bilingual UI/UX + tools AI agents use.

see my work ↓
resume ↗ linkedin ↗ npm ↗

Selected work

Product · UI/UX

Redesigning a bilingual recruitment platform

Bilingual recruitment platform. Three sub-brands, one system. Sole designer on the 2023 revamp after four years on the product.

Open case study
Enjin mobile login screen, navigate your future, held in hand
Product · AI-native

A bilingual hazard map on cited government data

Japan's official Nankai Trough earthquake and tsunami forecasts, on one bilingual map. Search any address for the projected shaking and tsunami height.

Open case study
Nankai Trough seismic intensity map of Japan, color graded by shaking strength
Web · Brand

A current, credible face for a course in AI and n8n

Landing site for a course in AI and n8n workflow automation. Visual design, layout, and system for a young, AI-fluent audience.

Open case study
manabiAI landing page shown in a floating browser frame on a dark backdrop
Brand · Web · Print

Design for a Tokyo social enterprise

Tokyo social enterprise spanning tourism, regional revitalization, health, and the circular economy. Design across tour booking, brand identity, and print.

Open case study
Miraidukuri site hero, timeless wisdom future vision, over a Japanese kaiseki table

Tools for AI agents

MCP · npm Rippr YouTube transcript extractor for AI agents. MCP server and Chrome extension, no API keys. MCP · npm Japan UX MCP A Japanese UI correctness enforcer. Audits CSS and markup against the JLReq and JIS standards. MCP · npm PayPay MCP MCP server for PayPay, Japan's largest QR wallet. Built on the Open Payment API.

Also: Rakuten, Xendit, tabedata, pdf-it. More on GitHub and npm.