How do you say "I understand" in Japanese?

Quick use

Use わかりました (wakarimashita) when you want to show clearly that you understood and will move forward.

Chunk or pattern

• This is a fixed response.
• Learn the whole line first instead of rebuilding it word by word.
• The practical point is knowing when to use it honestly.

Base form contrast

• わかります (wakarimasu): I understand / I know.
• わかりました (wakarimashita): I understood / got it.

This contrast is enough at the beginning. You do not need a full grammar lesson here.

Practical note

Use this only when you actually understand. If not, say まだわかりません or ask again.