I'll explain about four interesting Japanese words: Otaku, Moe, Tsundere and Burikko.
Otaku means people who like something or someone too much. Especially those who like idols and animated cartoons. They are said to be in Akihabara.
Moe means the word of admiration. People say "Moe" when they see some cute things or people. People include animation characters in this case.
Tsundere means human's attitude. A person is sometimes very cold to others, but a person is sometimes very very kind. This attitude is called Tsundere.
Burikko means people who change the behavior especially in front of men. They act cutely on purpose because they want to be loved by men.
Like this, there are many interesting words in Japan. I seldom use these words, but I have heard these words many times recently.
