Been meaning to get round to it for a long time but will try to review all the equipment that we use for TV production.
Narration (known as "Afureco" [アフレコ] in Japanese which is short for "After Recording") for Culture Japan Season 2 is done in my office. For the pilot episode of Culture Japan Season 0, we used a studio in Roppongi who charged us 200,000 yen for using their facilities - and for only a few hours!
My production budget would run out pretty quick if we carried on like that so decided to do it myself.
The voice actress for Mirai Suenaga is UTACO and we regularly stream our recording sessions from the studio on my Ustream channel - you need to keep an eye out on my Twitter or Facebook as broadcasts are spontaneous - yesterdays broadcast below.