I never get tired of looking at screenshots of Audioblog's Japanese product Castella. Here's a review of Castella.jp.

ページのトップに書いているようにこれはCastellaで独自に開発されたものではなく、アメリカの有料サービス 「audioblog.com」を日本語化したもののようです。定評もありますので安心できそう。

They have heard of Audioblog's good reputation in the US and are looking forward to the great service Japan. This user liked the ease of video casting, plus the web-based recorder; being able to publish to outside blogs, and the flexibility in content creation: recording by phone, by upload, and via the MP3/Quicktime web recorder.

(Automatic conversion of video to iPod video-compatible Quicktime not yet launched on Castella)