Not sure if this rather long and detailed article can be translated into English, but a recent domestic Japanese flight to Amami Oshima (one flight a day) could not take off due to overweight wrestlers and balance issues. Just four of them weighed 450 kg between them. Another aircraft had to found at short notice.
力士がいっぱいで飛行機が重量オーバー! 急きょ臨時便の舞台裏 | NHK | 航空