Zenhokyo
One of the most authoritative gemmological laboratory offering gemmological analysis using the latest equipment.
GAAJ-ZENHOKYO
Homepage	Address	Contact	
www.gaaj-zenhokyo.co.jp/	8F Daiwa-Ueno Bldg
5-25-11 Ueno
Tokyo 110-0005
Japan
	N: Natsuki Takahashi
T: +81-3-3835-2466
F: +81-3-3839-0798
E: laboratory@gaaj-zenhokyo.co.jp	
Leading gemmological educational institution in Japan has been providing professional education in the field for the past 30 years. Zenhokyo Laboratory is equipped with the most professional and advanced testing devices and systems, including inductively coupled plasma-mass spectrometers, laser tomography systems, laser induced breakdown spectrometry and the latest cathode luminescence equipment.