I have absolutely no idea if the Japanese celebrate the Valentine's Day or not. In my universe, they do. Bite me, I'm the writer, I can do whatever the hell I want! XD
And now, some Japanese terms...
* U-un - 'Y-yeah.'
* Sou da na - 'Yeah, I guess (so).'
* Mou - Hard to translate, too... something like 'I can't believe it!'.
* Ryougai, taichou! - 'Roger, captain!' ^_^
* Yoshi - 'All right, then'
* Ano... - 'Um...'
* Iya - 'No'
* Neesan, Oneesan - 'big sister'
* Imouto - 'little sister'
* Wakatta - 'I know', 'I understand'
* Chikusho! - 'Dammit!'
* Che - 'Damn'
* Chotto! - 'Hey!', 'Wait a sec!'
* Daijoubu - 'It's ok', 'don't worry'
* Saa - 'Well then'
* Gambare - 'Hang in there'
* Ja - 'Later', 'See ya'
* Dame yo! - 'No way!', 'I won't allow it!'
* K-Konban wa - 'G-good evening'
* Sumimasen - 'I'm sorry'
* Arigatou gozaimasu! - 'Thank you very much!'
* Aa - (masculine) 'Yeah'
* Hen da yo... - 'Weird...'
* Nan da? - 'What is it?'
* Baka - 'Idiot.' Do I really have to tell you this?
* Wakatteru yo! - 'I know *that*!'
* Otouto - 'little brother'
* Ichigo - 'Strawberry'. Okay, so the name sucks; gimme a break, I've never been to a bar/nightclub.
* Gomen nasai - 'I'm (very) sorry'
* Sou da! - 'That's right!'
* Gomen - 'Sorry'
* Arigatou - 'Thanks'
* Masaka... - 'Could it be...?' or 'It can't be...!'
* Moshimoshi - 'Hello' (on telephone)
* Kamawan - 'I don't care.'
* Iku. - 'Let's go.' Very harshly put. Typical Aya ^_^
* Ara! - 'Oh!', a sound of startlement.
* Kirei - 'beautiful'
* Kuso - 'shit', 'damn'
* Sou ka? - 'Is that so?'