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