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