Pera Pera Penguin

5 -minute Japanese Lessons by Hitomi Hirayama

http://www.yomiuri.co.jp/dy/columns/0002/

Format of the lessons
All the lessons are in PDF files.

Language Level
Beginner? Advanced?

Focus of the lessons
Speaking? Writing Kanji? Reading train signs?

Features of note
features, for example "this lesson gives tips on using you Japanese mobile phone to help with reading Train maps."