Osaka
Oosaka
proper noun
A big place called Osaka? This is the city of Osaka! Ever heard of it? It's a big city, and kind of the rival to Tokyo.
The おおさか reading for this word is made up of the kun'yomi for each kanji. You've learned the おお reading (like in 大きい), but you haven't seen the さか reading for 阪 yet.
That said, doesn't 阪 look a lot like 坂, which also means "slope"? Turns out they share the さか reading as well, so if you remember the word 坂 you can apply that reading here. (In fact, 大阪 was sometimes written as 大坂 in the old days.) The easiest mnemonic is probably just to think of the city of Osaka though… Just don't forget about the double おお.
大阪にいる
to be in Osaka
大阪にある
to be in Osaka
大阪に行く
to go to Osaka
大阪のおばちゃん
one's aunt in Osaka, an older woman in Osaka
大阪の人
a person from Osaka
大阪のノリ
Osaka's spirit, Osaka's mentality
大阪であそぶ
to have fun in Osaka
大阪で出会う
to meet in Osaka
大阪で食べる
to eat in Osaka
私は生まれは大阪です。
I was born in Osaka.
大阪には美味しい食べ物がたくさんあります。
Osaka has a lot of delicious food.
大阪旅行が楽しみすぎて、勉強がすっかりお留守になってしまっていました。
I was so excited about the Osaka trip that I totally neglected my studies.