About RailJet Co., Ltd.
Delivering high-precision Japanese electrical testing instruments, earth ground resistance analyzers, and transit safety solutions worldwide with a dedicated Tokyo engineering team of 20+ specialists.
20–25 Years of Japanese Precision & Surpassing ¥180 Billion in Orders
“For over 20 to 25 years, RailJet Co., Ltd. has stood at the forefront of electrical safety and precision grounding instrumentation in Tokyo, Japan. Backed by our dedicated 20-member Japanese engineering and research team, we have achieved a major international procurement milestone exceeding ¥180 Billion.”
20〜25年の製造実績
世界15カ国以上
JIS C 1302 & IEC 61010-1 Certified Specialists
Precision Japanese Engineering for Critical Power & Rail Infrastructure
RailJet Co., Ltd. (Tokyo, Japan) is an elite manufacturer specializing in advanced earth resistance clamp meters, soil resistivity systems, and digital instrumentation for over 20 to 25 years. Operating with a core team of 20 highly trained Japanese engineers, metrologists, and QA researchers, our instruments serve high-speed train networks, power substations, and industrial manufacturing plants across Asia and globally.
“With 20 to 25 years of relentless precision engineering, our Tokyo team continues to push boundaries in noise-rejection digital filtering, non-contact loop resistance testing, and cloud-ready diagnostic tools for modern power grids.”
JIS C 1302 Compliance
Japanese Industrial Standards certified.
Tokyo Calibration Lab
100% individual multi-point factory calibration by our 20-member team.
Our Mission
Absolute Measurement PrecisionTo engineer ultra-reliable, zero-interference electrical diagnostic instruments that safeguard technical personnel, prevent power grid outages, and ensure total grounding integrity.
Our Vision
Next-Gen Smart InstrumentationTo set global standards in non-invasive electrical testing by merging Japanese micro-electronic craftsmanship with Bluetooth telematics and predictive maintenance technology.
Meet Our 20-Member Japanese Engineering & Leadership Team
With 20 to 25 years of accumulated industry mastery, our Tokyo headquarters houses 20 dedicated specialists spanning hardware R&D, metrology calibration, DSP filtering, and global supply management.
Kenji Takahashi
Chief Executive Officer & Founder
Hiroshi Tanaka
Chief Technical Officer (CTO)
Kazuki Watanabe
Lead Sensor Design Engineer
Takashi Ito
Principal Calibration Specialist
Naoki Yamamoto
High-Voltage Isolation Engineer
Shinji Nakamura
Embedded Firmware Architect
Yuki Kobayashi
DSP & Noise Filtering Specialist
Kenta Kato
Microprocessor & PCB Engineer
Ryota Yoshida
Production & Cleanroom Manager
Souta Sasaki
Environmental Testing Specialist
Masato Yamaguchi
Senior Metrology Technician
Tatsuya Matsumoto
Grounding Diagnostics Engineer
Yuto Inoue
Bluetooth Telematics Engineer
Shohei Kimura
Substation Systems Application Lead
Kenichi Hayashi
International Supply Chain Director
Keisuke Shimizu
Global Procurement & Logistics Head
Haruto Saito
International Client Solutions Manager
Tomoya Mori
Compliance & Standards Officer (JIS/IEC)
For direct technical consultations, contact our Tokyo headquarters engineering desk at info@railjet-global.jp or call +81 3-5829-9180.
Japanese Precision Manufacturing
Engineered and assembled under strict cleanroom conditions in Tokyo, Japan with automated sensor calibration and high-voltage dielectric isolation testing.
Precision Micro-Sensor Assembly
Permalloy clamp cores and surface-mount microprocessor boards crafted with strict micro-tolerances for maximum magnetic flux linearity.
Environmental & Stress Testing
Temperature chamber cycles (-20°C to +60°C), IP-rated moisture sealing, and 2-meter drop-shock verification on all production batches.
Precision Calibration Lab
Traceable primary calibration standards with automated report generation for IEC 61010-1 and JIS C 1302 quality certificates.
RailJet Headquarters (Tokyo, Japan)
2-chome, Chiyoda-ku, Tokyo 101-0048, Japan
〒101-0048 東京都千代田区2丁目