分かるさ

you'll understand

→ 分かる
phrase Uncommon #12,065
you'll understand The sentence-ending さ adds a casual, confident tone. The subject and tense depend on context; it can also mean “you'll see.”
JA: 心配しなくていい。すぐ分かるさ。
EN: Don't worry. You'll understand soon.

お父さんになったら、分かるさ。

You’ll understand when you become a father.

分かるさ

I get it.

— ラブ・アクチュアリー (2003)

誰でも分かるさ

Anyone can understand it.

— Good Luck, Have Fun, Don't Die (2026)

今にあんたも俺の魅力が分かるさ

Soon, you'll see my appeal too.

— es[エス] (2001)

子どもができたら、分かるさ。

Once you have kids, you'll understand.

すぐに分かるさ

You'll understand right away.

— REC / レック (2007)

お前もそのうち分かるさ。

You'll understand someday too.

親なら分かるさ

If you're a parent, you'll understand.

— キャッチ・ミー・イフ・ユー・キャン (2002)