“Of its own accord” in Japanese
Short answer
Of its own accord in Japanese is “勝手に” (katteni). Full meaning: arbitrarily, of its own accord, without asking, voluntarily, willfully, as one pleases, selfishly, by itself, automatically.
Other ways to say “Of its own accord” in Japanese
自ずと
onozuto naturally, in due course, by itself, of its own accord
自ずから
onozukara naturally, in due course, by itself, of its own accord
自づと
onozuto naturally, in due course, by itself, of its own accord
おのずと
onozuto naturally, in due course, by itself, of its own accord
おのずから
onozukara naturally, in due course, by itself, of its own accord
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