Here is the full list of all 55 Yakuza Kiwami achievements. It takes around 80-100 hours to unlock all of the achievements on Windows.
Completed all of the Climax Battles.
Breaker Majima forced his way into a fight.
Walked 1km during Premium Adventure while holding Haruka's hand.
The Mad Dog of Shimano forced his way into a fight.
Completed the final chapter.
Completed 50% of the Completion List.
Enjoyed mahjong with a hostess.
Obtained all Soul, Technique, and Body abilities.
Spent a steamy moment with Rina.
Successfully asked a hostess out on a date.
Met the mysterious lady, Goromi.
Spent a steamy moment with Yui.
Completed "Wife of a Yakuza."
Completed chapter 12.
Completed chapter 11.
Completed "Man On a Ledge."
Completed "The Fake Mizuki's Truth."
Won all tournaments in the underground coliseum.
Completed chapter 10.
Completed chapter 9.
Completed chapter 8.
Completed all training for Komaki Style.
Reached Rank B in Majima Everywhere.
Completed chapter 7.
Completed "Bet On A Champ."
Completed "A Doctor's Duty."
Completed chapter 6.
Completed "My Baby's a Showgirl."
Completed chapter 5.
Completed 30 substories.
Met Zombie Majima.
Completed chapter 4.
Thug Majima forced his way into a fight.
Completed 10 substories.
Completed "The Price of an F-Cup."
Obtained at least 10 Soul, Technique, and Body abilities.
Met Officer Majima.
Completed chapter 2.
Completed chapter 3.
Got chased by Majima.
Completed chapter 1.
Collected the money owed.
Obtain all other achievements.
Completed 100% of the Completion List.
Slugger Majima forced his way into a fight.
Upgraded all Majima Everywhere abilities.
Completed all substories.
Won all Pocket Circuit races.
Won against all rivals in MesuKing.
Played all minigames.
Completed the game in Legend Mode.
Assaulted by Majima from above.
Assaulted by Majima from a manhole.
Defeated Amon.
Obtained EX Rank on Haruka's Requests.