Here are TV Stations in Tokyo.
NHK 1 CH. 1 (PSIP 1)
NHK 2 CH. 3 (PSIP 2)
NIPPON TV CH. 4 DT 25 (PSIP 4)
TBS TV CH. 6 DT DT 22 (PSIP 6)
FUJI TV CH. 8 DT 21 (PSIP 8)
TV ASAHI CH. 10 DT 24 (PSIP 5)
TV TOKYO CH. 12 DT 23 (PSIP 7)
Tokyo MX CH. 14 DT. 20 (PSIP 9)
Open University TV CH 16. DT 28
Japan uses a different DTV system than the United States, but their analog are identical to each other. Analog uses NTSC, however in Japan their digital uses ISDB-T which I'm not sure if its compatible with ATSC in North America like Canada, US, and Mexico.