Sports Science × Pose Estimation × XR

Teaching AI to see human movement.

From sports & exercise science to AI — I build markerless human pose estimation and AI-driven movement analysis, and break down the research here and on YouTube.

MediaPipe
OpenPose
ARKit
OpenSim
Unity
Meta Quest

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130+YouTube videos

10+international talks

EN · 日本語bilingual content

POSE DETECTED · 98.7%

Focus areas

🧍

Human Pose Estimation

MediaPipe, OpenPose, and the latest markerless methods.

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Motion Capture & Biomechanics

Sports movement analysis and validation studies.

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Computer Vision & AI

AI-driven movement analysis and modeling.

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XR / Metaverse

Unity & Meta Quest development.

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Latest articles

How Far to Trust a Wearable’s Number: Velocity, Muscle Timing, Jump Height2026年9月10日
Four 2026 validation studies on wearables — velocity sensors, EMG timing, a wireless EMG device, and jump tools — agree: reliable for a group or a trend, shakier for one session, muscle, or device comparison.
The Sensor Is Not the Measurement: IMUs, Sweat, and Modelled Forces2026年9月10日
Three 2026 papers — multi-IMU sync, sweat biosensors, and video-to-force modelling — sit several inferential steps from what they want to measure. The sensor is not the measurement; every modelled step adds error.
Borrowing a Pose Model for a New Job: Squats, Table Tennis, and Fall Risk2026年9月10日
Three 2026 studies bolt a task-specific stage onto a general-purpose pose estimator — grading squats, measuring a table-tennis elbow, predicting a fall — and each hits the same wall: the accuracy number belongs to one camera setup.
Where Markerless Kinematics Holds Up: Two Reviews, Two Validation Tests2026年9月10日
Two 2026 reviews and two validation studies on markerless kinematics converge on one answer: accuracy is not a single number — it is specific to the joint, the plane, and the task.
The Finished Build: Body, Face, Fingers & Wrists From One Webcam — Avatar Talk2026年8月13日
The Avatar Talk capstone: body, face, fingers and wrists driving one VRM from a single webcam, all in the browser. Why an arm solve can’t roll the wrist, the thumb bending about the wrong axis, caching frames and counting drops, the neutral face where 0.3 is the new zero, the mirror rule — and an honest ~9 fps, not the 30 I’d claimed.
Face, Hands & Filtering: The Full Webcam Avatar — Avatar Talk Part 4 (MediaPipe → three.js)2026年8月13日
The Avatar Talk finale: pose, face and hands driving one VRM in a single browser render loop. The One Euro filter that beats the jitter-vs-lag trade, filtering landmarks at the source, MediaPipe’s 52 ARKit blendshapes mapped to VRM expressions, and finger bend-not-splay hand tracking.

Featured video

Profile

I’m Takashi Fukushima, a researcher and developer working across sports & exercise science, motion capture, and computer vision. My focus is markerless human pose estimation and AI-driven movement analysis, alongside XR development with Unity and Meta Quest. I publish peer-reviewed research and break it down here and on my channel.

Human Pose Estimation (MediaPipe, OpenPose, latest methods)
Motion Capture & Sports Biomechanics
Computer Vision & AI movement analysis
XR / Metaverse development (Unity & Meta Quest)

Achievements

Positions & Affiliations

Specially Appointed Assistant Professor, Education Incubation Center, Tokyo Gakugei University
Executive Board Member, Asia Council on Exercise & Sports Science (ACESS)
Executive Board Member & Secretary, Global Metaverse Laboratory
CTO, Aletheia LLC
International Technological Partner, Sports Performance Analysis Association in Bharat (SPAAB) — Capacity Building Sessions; HALO (Human Analysis of Locomotor Optimization) Sessions 1／2／3

Commissioned & Funded Projects

FY2024 — Japan Sports Agency, Support Project for Reiwa Japanese-Style School Physical Education: enriching PE classes in the GIGA School environment (Theme 1) and inclusive PE classes for children with and without disabilities (Theme 2) — Secretary-General
FY2025 — MEXT commissioned project: Promoting the Use of Advanced Technology and Education Data for Next-Generation Schools (demonstration project on cutting-edge technology and education data) — Research Specialist (Engineer)
FY2025 — Support Project for Reiwa Japanese-Style School Physical Education (improving teaching methods for inclusive PE classes) — Deputy Research Director
FY2026 — MEXT commissioned project: Promotion of Moral Education that Fosters the Ability to Put One’s Way of Life into Practice — Specially Appointed Assistant Professor