http://japanese.about.com/bl50kanji_heiwa.htm
http://www.geocities.com/andyjapo/
http://www.gorinkai.com/nihongo/lecc_01/lecc_01.htm
http://www.enst.fr/nihongo/matome/01.pdf
http://www.irimi.it/009-02.html
http://www.nihongo.d2g.com/aprenderj/japanese_online/hiragana/hiragana.php
http://www.nihongo.d2g.com/aprenderj/japanese_online/katakana/katakana.php
http://www.japanese-online.com/language/index.htm
http://nihongo.fujikodesu.com/frame.htm?list&kanji&g1&en
http://ww1.baywell.ne.jp/fpweb/drlatham/nihongo/katakan.htm
http://ww1.baywell.ne.jp/fpweb/drlatham/nihongo/kanji/kanji.htm
http://www.barabbi.org/nihongo/vowels.html