こんにちは
Hello-The は is pronounced as わ
じゃね
Goodbye
すみません
Excuse me
ありがとう
Thank you-add ございます to make it more formal
ごめなさい
Sorry-ごめん can be used used, but it is far more casual, and is typically used between family and friends
いただきます
Use this before a meal, literally meaning “I humbly receive”
ごちぞうさでした
Used after finishing a meal, literally “It was a feast”
いってきます
Used when leaving home, literally “I’m going and coming back”
いってらっしゃい
Used as farewell for someone leaving the house, literally “Go and come back”
ただいま
Used when returning home
御帰りなさい
おかえりなさい(welcome home)
おやすみなさい
Good night