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