Works
A selection of recent activities and past projects.
Recent Activities
Kosshi Outliner
2026
A native outliner app for Mac and iOS. Editor built from scratch with CoreText, syncs via iCloud.
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MofuMofu Dice
2026
An iOS dice app where cute animals roll dice for you. Realistic physics with SceneKit and haptic feedback.
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Sankome
2025 – Present
A small robot that expresses emotions with eye movements and reacts to touch or voice.
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Similar Image Search with Python & TensorFlow (Book)
2023
A hands‑on introduction to similar image search using Python and TensorFlow.
Selected Projects
Online Exercise Service
May 2020 – Nov 2021
Co‑founded and developed the live exercise app BAKOON! as an internal startup. Covered app/backend development, growth, marketing, user support, and sunsetting.
Similar Image Search System (Backend)
Dec 2018 – Nov 2021
Designed and operated a backend service for similar image search with performance and availability in mind.
Talks
Introduction to the Rust‑based vector search engine Qdrant
Rust LT Online #6 - 2023
Overview of Qdrant, a Rust vector database featuring filtering on search.
Building a realtime streaming service with React Native
React Native Matsuri 2021 - 2021
An overview of the technologies used to build BAKOON!, a React Native realtime streaming service.
SlidesApp development with React Native and Firebase
TECH STAND #5 - 2021
How we leveraged Firebase in React Native mobile app development.
SlidesChallenging new business development with React Native
React Native Meetup #12 - May 21, 2021
Learnings from launching BAKOON! with React Native.
SlidesYahoo! Shopping Similar Image Search initiative
Bonfire Data & Science #1 - Oct 25, 2019
Introduced Yahoo! Shopping’s similar image search efforts.
SlidesPublications
Neural decoding of code modulated visual evoked potentials by spatio‑temporal inverse filtering for brain‑computer interfaces
NCSP - Mar 2017
Neural decoding of code modulated visual evoked potentials by spatio‑temporal inverse filtering for brain‑computer interfaces
IEEE EMBC - Aug 2016
LinkNeural decoding and application to BCI of code‑modulated visual evoked potentials (Japanese)
Signal Processing Research Group - May 2016
Awarded: Signal Processing Research Group Prize
LinkApplying reliability‑based ARQ to code‑modulation VEP‑BCI (Japanese)
The 27th Signal Processing Symposium - Mar 2015
Link