Case Studies

A booking and payment platform for iOS and Android, launched in 2 months and reaching 10K+ downloads.

An Android app focused on building morning habits, developed and released in 5 days with support for 8 languages.

A proprietary algorithm quantifies player performance, benchmarked against data from 100+ professional players. In operation for over 3 years.

Project management, team assignment tracking, monthly goal visualization, and an engineer skills-assessment system, built in 1 week.

Fruit trees are managed via QR codes, with daily photos automatically compiled into a growth log. Weather API integration lets staff check conditions at remote fields.

A full-stack web app with Vimeo-restricted video delivery, PayPal billing, and real-time chat, delivered by 2 people in 2 weeks.

Aligned with CEFR levels A1-B2, with three modules: handwriting OCR scoring, AI speech scoring, and AI conversation, backed by a 7,800-word vocabulary database.

Manages everything from vendor applications and screening to Stripe payment and day-of check-in. A full-stack web app with 3 user roles, built by 3 people in 2 weeks.

Automates production of "2ch archived thread" videos. Used by a YouTube channel with 300K subscribers.

Automatically detects when a specific user starts an X Space and begins recording, with support for monitoring multiple users simultaneously.

Detects 33 body landmarks from browser camera footage and automatically counts squat reps. Also proposed an extension for security camera use.

Detects players, the ball, and the rim from game footage to automatically generate a scoring log with attributed scorers. Cross-references broadcast scoreboard OCR to confirm each score.

A public service where anyone can submit photos of road damage without registration; YOLO automatically judges them and plots the results on a map. A memory-efficient design that separates submission intake from detection.

An accuracy-focused system for businesses and municipalities that uses AI to detect road cracks and potholes from images and video, visualizing them on a map with GPS coordinates.

A visual inspection system that compares a reference image against an inspection image to detect scratches and defects. Preprocessing, alignment, and a multi-model fallback reduce missed defects.

An anomaly detection system that combines image classification with a VLM to judge normal versus anomalous. Runs entirely within Docker.

A web system that ingests scanned point clouds and, through segmentation and support-relationship analysis, physically simulates the collapse of a structure. Built up over three iterative generations.

A tool that judges whether an image involves face swapping or manipulation. Usable as a web app, and also callable from other systems via a REST API.

A Python library that forecasts demand from time-series data and, before producing a forecast, evaluates how reliable that data is likely to be.

An in-house analytics system that analyzes fan overlap between streamers (VTubers) from chat data and visualizes it as a network.

A system that extracts parts from CAD drawings into a database, enables searching for identical parts across other drawings, and auto-generates floor plans and structures based on past drawings.

A system that automatically extracts cause-to-effect relationships from documents, stores them in a Neo4j graph, and lets users search and visualize causal chains in natural language.

A two-call pipeline that reasons over Japanese input in English before translating the result back to Japanese. A legal-domain PoC that handles ambiguous input with a clarifying-question loop.

Combines two functions in one mobile app: AI search to quickly discover existing apps, and, when nothing matches, a wish-posting flow that turns into developer quotes and contract-development leads.

A GraphRAG system, running fully on-premise via Docker with no dependency on external APIs, that responds to natural-language questions with the closest matching solutions and points to check.

A free-to-play fighting game that runs in the browser. The AI learns and adapts to the player's behavior patterns in real time during matches, becoming tougher as the level rises.

A pipeline that, given just a single topic keyword, autonomously handles everything from script writing, narration, subtitles, B-roll, visual design, Remotion rendering, and thumbnails to scheduled YouTube uploads.

A tool that, given an input video, automatically runs transcription, speaker identification, and emotion detection, and outputs a video with bottom subtitles and animated character portraits for each speaker.

A pipeline that, given just a dialogue script, automates panel image generation, line-by-line TTS, vertical video rendering with Remotion, and posting to YouTube/TikTok.

Unattended mass production of save-worthy Instagram content, from theme selection through posting. A single codebase runs multiple accounts across multiple languages, switching between fully automatic, semi-automatic, and review lanes.

A CLI tool that reverse-engineers note.com's internal endpoints (no official API exists) to automate draft saving, publishing, hashtags, and eyecatch images across multiple accounts.

A store owner sends a photo, and the system automatically generates an ad image and caption, then schedules the post to Instagram. Uses OCR + VLM fact-checking, with security CI built in. An in-house product.

A web app for studying past questions from Japan's certified care worker exam, organized by year and subject. Includes subscription billing and Japanese-Indonesian translation to support international caregivers preparing for the exam.

Students have voice conversations with an AI and receive automatic scoring and feedback across five axes: grammar, vocabulary, fluency, pronunciation, and content. Teachers can create assignments and review results.

A web app that automatically generates listening test scripts, audio, and questions, with per-speaker accent and speed settings and an audio playback UI. Live in production.

A content sales platform for creators combining one-off purchases with monthly plans, built with custom session auth, video streaming, a payment adapter, and a DB queue with workers.

A Shopify app that generates Yamato B2 Cloud shipping label CSVs from unfulfilled orders. Handles prefecture code conversion, name reordering, Shift_JIS encoding, and the fixed 97-column format.

An Odoo 17-based production management system for manufacturing shop floors. Implements priority calculation across 5 constraints, bottleneck visualization, OR-Tools-based auto-scheduling, and a tablet UI.

A gift-related web service built with Django, Tailwind CSS, and DRF.

A web application built with Django.

An in-house team dashboard built with Next.js.

A mobile app that provides a natural transition into focus and an immersive experience. Manages 15/25/45/90-minute timers, a 4-7-8 breathing guide, task templates, and daily stats locally.

A web service under continuous, long-term iterative development since its early stages. Built with Python, JavaScript, and HTML.

A food delivery Flutter app supporting three user types: customers, restaurants, and delivery drivers. Built with JWT authentication, Stripe payments, order tracking, and Riverpod state management.

A Flutter mobile app with Stripe payments, image selection, multi-language support (intl), and sharing features.

A gig work matching app similar to Timee. Built in Flutter with worker/company roles, job search, first-come-first-served instant confirmation, QR code attendance, and map display.

No streaks, no penalties. On rest days, tasks are hidden to remove guilt. A mobile app with four screens: Declare, Tasks, Pool, and Reflect.

An iOS app that uses ARKit to detect the ground and place distance markers from 1-10m in AR space. Measures the ball's landing position by tap and judges success within +/-15cm.

An in-house standard kit with a 3-layer structure to secure contracted projects. Automatically runs gitleaks/semgrep/trivy on push/PR/weekly schedule, unifying an ASVS L1 checklist with report templates.

A Node.js service that receives Zoom Phone webhooks and forwards call data to FileMaker in real time. Deployed on Render.