自分の責任

one's own responsibility

→ 自分
phrase Rare #36,452
one's own responsibility Used when someone is responsible for their own actions, decisions, or situation. Depending on context, it can also mean “at one's own responsibility.”
JA: 自分の責任で最後までやり遂げます。
EN: I’ll see it through to the end on my own responsibility.

もう大人なのだからやるべきことは自分の責任決めなさい

You're an adult now, so decide for yourself what you need to do and take responsibility for it.

自分の責任自分は覚悟している

I'm prepared to take responsibility for my own actions.

自分は覚悟している自分の責任

I'm prepared to face the consequences; it's my responsibility.

お前が他の人と違うのは自分の責任じゃない

It's not your fault that you're different from everyone else.

— 道 (1954)