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