Personal responsibility: bearing the consequences of one's own actions or decisions; doing something 'at one's own risk'.
このプログラムを利用する場合は自己責任でお願いします。
Please use this program at your own risk.
副作用の可能性があるので、服用は自己責任で判断してください。
There may be side effects, so decide whether to take it at your own responsibility.
彼の失敗は自己責任だとみなされた。
His failure was regarded as his own responsibility.