Irresponsibility — lack of responsibility or a careless attitude that avoids taking responsibility.
彼の無責任な発言が問題を大きくした。
His irresponsible remarks made the problem worse.
親として無責任な態度は許されない。
An irresponsible attitude as a parent is not acceptable.
無責任だと言われないように、約束は守ろう。
Let's keep our promises so we aren't called irresponsible.