Various titles are unlocked for accomplishing various feats in-game. These can be viewed in the records screen (third tab from the left), and one can be selected to be displayed in online matches. The titles are listed below.
How to Unlock
Unlocked by default. (Select this to not display any title.)
Unlocked by default. (Allows you to enter your own custom title name.)
Win one match.
Finish a match in first place with one rival having a negative score.
Finish a match in first place with two rivals having a negative score.
Finish a match being the only player with a positive score.
Power to Cause Yakuman
Win a Yakuman hand. (Kazoe Yakuman doesn't count.)
Marisa's Paarenchan is...
See a Paarenchan (8th consecutive win as East). (This can be unlocked by an opponent winning with Paarenchan.)
Power to Cause Miracles To Occur
Win a double Yakuman hand.
Saturday Night Fever
Select Iku Nagae on a Saturday night.
Clear the Story Mode scenarios.
Clear the Story Mode scenarios without continuing.
Welcome to the Gambling Room
Play an online match (?)
Win an online match.
Win 10 online matches.
Consecutive Victory Beginner
Win 2 consecutive online matches.
Consecutive Victory Master
Win 5 consecutive online matches.
Win 10 consecutive online matches.
How to Unlock
Win 100 online matches.
Use a special ability and win.
Win a hand with 8 or more dora with special abilities disabled.
With skyrocketing rules, win a hand worth 5 million or more points.
Idling Life Away
Clear the Twilight Bar in Story Mode. (?)
This Closes One Case
Clear the Kourindou scenario in Story Mode.
Last Hand Miracle
Win a match with a comeback on the final hand from a score difference of 24,000 points or more.
Win 20 mangan hands.
Win 10 haneman hands.
Win 10 baiman hands.
No-guard Battle Method
Win 10 "hadaka tanki" (4 declared melds, waiting to pair up the last tile) hands.
King of Getting Shot Down
Opponents ron off your discards 100 times.
Like a River's Flow
100 hands ended in a draw.
Catch the Dragon!
Get a kan-dora.
Power to Dye
Win 3 hands with menzen chiniisou.
Win 10 hands with sanankou.
Call 100 tiles.
Double Riichi 5 times.
How to Unlock
King of Suffering Ippatsu
Opponents ron off your discard to win with ippatsu 5 times.
Win 20 hands with ippatsu.
The Long Journey
Win 200 hands
Power to Pin Down Kan
Win a hand with chankan.
Won't give up until the very end!
Win with haitei or houtei a combined total of 5 times.
Dora Burst Master
Win a hand with 12 or more dora.
Lose 24,000 or more points in a single hand.
Declare kan a total of 50 times.
Win with rinshankaihou.
Kan 5 times where you give an opponent's pon Dora status
20 consecutive hands without letting an opponent ron from your discard.
Power to Make Waits Wider
Win 20 hands with a 3+ side wait.
Thin Ice Victory
Finish in 1st place with a winning margin of 500 points or less over 2nd place.
Finish a match without winning a single hand.
Finish a match without anybody winning a single hand.
Person Who Knows All Yaku
Win at least once with every yaku besides those worth an automatic yakuman.