I've never played on Tenhou but I just noticed (when I was looking for something else, as usual!) that they have a page listing the hundred most recent Yakuman wins there.
http://tenhou.net/sc/ykm.html
For each one you can click the first link to view the replay or second one just to see the tiles.
The list gives a good impression of the size of the playerbase and a real sample of the relative rarity of Yakuman hands.
Currently the hundred wins span only seven hours, although that's probably peak time in Japan (17:00 to midnight).
The "big three" dominate but there are also a few more interesting cases.
32 x Four Concealed Triplets
29 x Thirteen Orphans
24 x Big Three Dragons
7 x Four Concealed Triplets with pair wait
3 x Little Four Winds
1 x All Honours
1 x All Honours + Big Three Drags
1 x Non-dealer instant win (Chiihou)
1 x All Terminals
1 x Nine Gates
For Yakuman frequencies on Tenhou within a much larger sample of all winning hands (645 million!) check this thread:
https://www.reddit.com/r/Mahjong/commen ... _hands_on/
That sample is big enough to include Pure Nine Gates, Four Kongs and even nine hands with three Yakuman each.
Log of latest Yakuman wins on Tenhou
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Re: Log of latest Yakuman wins on Tenhou
Off-peak the hundred hands took seventeen hours.
Got 3 x All Green this time.
Got 3 x All Green this time.
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Re: Log of latest Yakuman wins on Tenhou
Someone got a nice counted Yakuman today without any Dora.
http://tenhou.net/0/?log=2019091019gm-0 ... &tw=3&ts=3
http://tenhou.net/0/?log=2019091019gm-0 ... &tw=3&ts=3
Spoiler: show