Source: http://www.inside-games.jp/article/2013/11/14/71982.html
Translation: Daigensui

Hello everyone,

according to the translation of recent Japanese interview with Viktor Kislyi, the ETA for patch 8.10 (that will bring the Japanese tanks) is mid December. That means the test server will start quite perhaps in a week or so.

More info from the interview:

– going to “invest” a lot in E-Sports due to the competitive nature of the Korean market
– Japanese Teams for WoT competitions are pretty strong, due to (1) competitive (2) military fans (3) G&P
– F2P is the way of the future, V.Kislyi doesn’t want pay to win
– WoT, WoT:B, WoT 360, WoTG, and WoWP will be released to the Japanese market, but not as a separate server, the Japanese will play on current ASIA (former SEA) server