2011 —Tokyo
経歴

Career

Fifteen years between the business side and the technology side — twelve at Rakuten across engineering, product and program management, now leading digital and AI transformation at Shiseido. Outside of that, I build software for my own life and photograph the city.

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職務経歴

Work History

2023 —Tokyo

Shiseido / Shiseido Interactive Beauty

Leads an innovation group building IT solutions on ServiceNow, RPA and AI, and owns ServiceNow globally — ITSM and CMDB rollout, plus the governance that keeps a Centre of Excellence coherent across regions.

  • 2024.09 —Group Manager
  • 2023.07 – 2025.12Information Technology Strategist
  • Leads an 8-person innovation group delivering IT solutions with ServiceNow, RPA and AI.
  • Owns global ServiceNow management and development, including ITSM and CMDB deployment.
  • Established Centre of Excellence governance so ServiceNow practice stays consistent across regions.

ServiceNow · ITSM / CMDB · RPA · AI Adoption · IT Governance

2011 — 2023Tokyo · Singapore

Rakuten / Rakuten Asia

Twelve years across engineering, product and program management on advertising and marketing platforms. Started as a lead engineer, moved into management, and ended up running teams distributed across Japan, Singapore and India.

  • 2022.10 – 2023.06Senior Program Manager
  • 2021.01 – 2022.09Project Lead
  • 2020.10 – 2022.09UX Consultant
  • 2018.10 – 2020.12Group Manager
  • 2016.07 – 2019.09Assistant Manager
  • 2011.04 – 2016.06Engineer
  • Represented advertising product development in company-wide programs, aligning stakeholders and clearing blockers.
  • Managed teams across three sites — Japan, Singapore and India — owning recruitment, budget and product development.
  • Led the email marketing platform team, setting project priorities and owning product KPIs.
  • Built UX processes from scratch — user research and an organizational UX framework — as the practice did not exist yet.
  • Built web applications and large-scale data processing on Hadoop and Hive for the advertising platform.

Program Management · Product Management · UX Research · Hadoop / Hive · Team Building

つくったもの

Selected Work

Built outside the day job, solo, end to end.

Mobile AppOngoing

Kodomo Manabi App

A Flutter kanji-learning app built for his own children.

Hands-on QA on real devices caught UI bugs automated tests missed — text overflow, and a setting that failed to apply consistently across screens.

Flutter · Dart

Personal Tool2026.06 —

Bitelog

A personal nutrition and hydration tracker logged entirely through Discord.

A Next.js dashboard shows macro and hydration rings, goal progress, and 7/14/30-day trends, with CSV export. A confirm step before delete prevents accidental data loss.

Cloudflare Workers · Next.js · D1 · Drizzle ORM · Discord Bot

AI System2026.05 —

InfoPulse

An AI news-curation backend paired with a swipe-card iOS reader.

Personal “For You” and objectively-scored “Global” tabs keep two different axes from being confused. Read or swiped cards never resurface. Recent Spotify history feeds back into scoring via OAuth2.

Google Apps Script · Gemini API · Swift · SwiftUI · Discord API

All work →
つかう道具

Skills

Next.js · React · TypeScript · Tailwind CSS · Firebase · microCMS · Google Gemini · Clerk · Three.js · Vercel · Flutter · Swift · Cloudflare Workers · Python · Google Apps Script

Off the clock

Cameras

Nikon Z fc · iPhone 14 Pro

Lenses & Desk

NIKKOR Z DX 50-250mm · NIKKOR Z 28mm · MacBook Air M1 · iPad Air · HHKB Professional 2 · Keychron K2