Hi Katsuhiko,
my active time in Ham-Radio was in the 1980s in Bermuda. I used to have an Icom 720A.
Sorry I don't know anybody, who has information on an IC-700T.
Best regards, Wally.
Here you can find more info on the IC-700T
http://www.radiomuseum.org/r/icom_ssb_transmitter_ic_700tic.html?language_id=2Here is an old pic of my ham-shack.