Here are some interesting Japanese words for your enjoyment
Kashikomarimashita - I totally understand and will do as you command
Ton Demo Nai - no sweat, it aint nothing
o-Sewa ni natte kudasaimashite taihen arigatou gozaimasu - thanks for going out of your way for me, I am extremely thankful
oshii - darnit
yoshii - yay!
oi - hey
arya - oh man
o-negai moshiagemasu - I humbly ask it of you
O-kyaku-sama - guests, houseguests
Irrashaimase - welcome
Haizara - ashtray
O negai dekimasu ka? - you think you could do it for me?
Shitsurei shimasu - I am sorry
Rusu ni shite orimasu - I am not in right now, nobody is home
Go-chiso sama deshita - what a great meal
Itadakimasu - I humbly partake
Towards Better Japanese Ganbatte ne! Do Your Best! Makurasuki