What is the amount of 3-phase AC line-to-line voltage in Japan?

[najafabadi]

I need to know this voltage. May it helps me to find the answer of my previous question.
http://www.robot-forum.com/robotforum/kawasaki_robots/kawasaki_js2_power_supply_specification-t1808.0.html;msg6985#msg6985

[Kōkaku kidōtai]

Try using Google more... it doesn't hurt 

http://www.sensorcentral.com/worldsupport/standards12.php

Japan   
50/60 Hz
Single phase: 100/200 V,
Three phase: 200 V

[najafabadi]

Thank you. Actually I found the single phase japanese voltage in the google (100V), but 100 * 1.73 (1.73=square root of 3) that is 3 phase multiplier becomes 173V that I haven't heared before! Why is it 200V instead of 173V?
Also there is a JS-2 robot here that its controller use only 2 wire for input power supply. The wire labels are R and T. So it is possibble that JS-2 controller is not single phase may be it uses 2 line of a 3-phase japanese voltage. 
What is your opinion?
Also I don't know what is the acceptable input voltage tolerance for this robot. Do you know?
Can I connect a KAWASKI JS-2 controller with the above specification to a single phase 220V power supply? 
I haven't any JS-2 documentation.
Many thanks in advance for your helps.

Babak.Najafabadipour@gmail.com