In the Riichi community, various levels of table mannerisms are needed to be observed to create a conducive and pleasant playing environment for all depending on the event and players you play with. Below are the various level of mannerisms required; the lower level is the subset of a higher level

In Singapore, players are to observe good sportsmanship when playing Riichi mahjong. This means players are to have integrity, be good winners/losers, humble and always respectful of others.

Always in force (all levels, all table types) — Do Not:
Slam tiles · shout/scream · throw score sticks · mock/laugh/celebrate at moves or wins/losses · accuse of cheating without evidence · verbally abuse or personally attack players · rant >1min about a hand · blame/criticise other players · refuse dealer duties (shuffle/dice/wall-break)

Level	Do	Do Not
Automatic table	Press the button only after all score sticks are kept and exchanged · have the next dealer press the button	Place sticks on the tray/groove area where tiles drop or rise
1 – Friendly	Push the wall forward at an angle · wait your turn for starting tiles · vocalise Chi/Pon/Kan/Riichi/Ron/Tsumo before revealing tiles · discard Riichi tile before placing stick · place Rinshan tile down · keep dice on right after throwing · vocalise Yaku/score on win	Place tiles face down after Riichi · take the Ron tile · help others check Ura-dora · make self-deprecating hand comments · use phone unnecessarily · look at hands even post-Riichi · imitate anime/MahjongSoul behaviour
2 – Informal	Shove-shuffle (not rub-shuffle) · stack wall face-down · reveal tiles with two hands on win · make first discard only after all hands opened · ask host before eating · place sticks clearly, verify change before storing	Waste time after Riichi draw/discard · comment/question others’ play (advice-seeking OK) · look at hands even after outcome concluded · give unsolicited tips · show opponents’ winning tiles unasked · justify own plays · drink/smoke · wear earpieces · declare score in a language not everyone understands
3 – Semi-Formal	—	Use reference materials (Yaku list, cheat sheet) · check dead wall/next draws post-outcome · show hand post-outcome · discuss hands · thank players when claiming sticks · apologise for winning · fidget with tiles · play music
4 – Formal	Throw dice only after all walls stacked · pay with minimal sticks · announce score only on win, base → total → honba order	Mumble or comment during play · talk unless necessary · slide drawn tile to table-end on self-draw · look at other players’ faces, especially while waiting or after a win — keep gaze low
5 – Competitive	Dealer cuts the wall themselves · draw/discard/meld with one hand only · hold drawn tile at side before discarding · make first discard only after all hands arranged · each meld is stacked horizontally · Carried-over sticks placed with its long side facing to the right on the right side	Rest hand/arm beyond own tiles · touch another player’s wall or discard pool · split the dead wall out
5.5 – Association / Event Based (Japan tournaments)	Discard only after claiming the tile · wait for opponent to finish placing the Riichi stick before drawing · move discarded tile to far-left of pool immediately	—
Broadcast Only (do not imitate at a regular table)	Push the wall forward at a shallower angle than standard · bring the winning tile next to the hand after declaring Ron · keep the drawn tile obviously visible to camera, at a decent tempo, before discarding, even after Riichi is declared	Lay the drawn tile horizontally on top of the hand — practice has stopped