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