Forex FF & Oanda contradict FXDD, others on Tokyo session hours?

Apologies if this is wrong section. Working on a project that references FX business hours of the major exchanges; so far I've obtained 5 different sources, and there's disagreement about the Tokyo session. I've got to write something down, but I'd hate to flip a coin Anyone have the expert knowledge to solve this for me?

Forex Factory
Link: http://www.forexfactory.com/market.php
Tokyo: 00-09 UTC

FXDD
Link: http://www.fxdd.com/us/en/forex-reso...rket-sessions/
Tokyo: 23-08 UTC

Oanda
Link: http://fxtrade.oanda.com/analysis/market-hours
Tokyo: 00-09 UTC

ForexMarketHours.com
Tokyo: 23-08 UTC

Forex.TimeZoneConverter.com
Tokyo: 23-07 UTC

Tokyo doesn't use DST, so this shouldn't be too hard. I guess I could email fxcomtky AT boj.or.jp ... but I'm kinda not professional, so it'd be little awkward

IB, Alpari, FXCM, GAIN Capital, and CitiFX websites are mum.

Thanks for your time.

Source.