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