Yokogawa Test&Measurement Corporation

1954年 : 7月23日 : 毛呂山電機株式会社設立　 : 資本金18,000,000円

1988: July 28: Yokogawa Instruments Corporation established: (Headquarters: Koshoku City, Nagano Prefecture - now Chikuma City): Capital 90,000,000 yen: (Yokogawa Electric 60%, CGH 40% investment joint venture)

1990: April 6: Yokogawa Instruments Corporation: Capital increase 36,500,000 yen: Capital 126,500,000 yen

1993年 : 3月 : 18日 : ISO 9001認定取得

1995: April 1: Business transfer from Yokogawa Electric Corporation: (Field measuring instruments, indicator meters, etc.): Merged with Moroyama Electric Co., Ltd.: Capital 95,165,000 yen: Headquarters relocated to Musashino City

1996: October 1: Business transfer from Yokogawa Electronics Corporation: (Signal converters, etc.): Company name changed to Yokogawa M&C Corporation: Capital increase 204,835,000 yen: Capital 300,000,000 yen

1997: April 1: Control business transferred from Yokogawa Electric Corporation: (Single-loop controllers, temperature controllers)

1997年 : 7月 : 29日 : ISO 14001認定取得

2001: September 1: Business transferred to Yokogawa Electric Corporation: (Indicator meters, etc.)

2002: January 1: Production functions transferred to Yokogawa Electronics Manufacturing Corporation: Capital reduction 10,000,000 yen: Capital 290,000,000 yen

2002年 : 3月 : 31日 : 長野事業所閉鎖

2003: December 11: Received the 48th Shibusawa Award: (Mini leak clamp tester)

2004: April 1: Control business transferred to Yokogawa Electric Corporation: (Single-loop controllers, temperature controllers, signal converters, etc.)

2004: November 19: 52nd Electrical Science and Technology Encouragement Award: (Ohm Technology Award): Received: (Temperature collector)

2005年 : 1月 : 1日 : 減資 200,000,000円　 : 資本金 90,000,000円

2005: October 1: Business transferred from Yokogawa Electric Corporation: (Meters): Company name changed to Yokogawa Meter & Instruments Corporation

2006: February 6: Head Office relocated to Tachikawa City

2010: April 1: Measurement instruments business transferred from Yokogawa Electric Corporation: (High-precision, waveform, communication measuring instruments, etc.)

2014: December 1: Head Office relocated to Musashino City

2017年 : 10月 : 1日 : 社名変更　横河計測株式会社

2021: January 6: Head Office relocated to Hachioji City

2026年 : 2月 : 5日 : ISO 45001認定取得