Here is the full list of all 49 Yakuza 4 trophies - there are 38 bronze, 7 silver, 3 gold and 1 platinum.
Receive business cards from all hostesses, including ones you train in "Hostess Maker."
Gather at least one outfit from each category in "Hostess Maker."
Acquire the title "Star of the Coliseum."
Defeat Amon and get through all the substories.
Create one or more weapons for each weapon category.
Have one of your apprentices win the Rookie Tournament in "Fighter Maker."
Have a hostess wear a present you give her.
Have a hostess invite you on an after-work date.
Collect all Memos in the Pause Menu.
Golf and fish five times each.
Collect two of each different tile pattern in mahjong.
Achieve a promotion in shogi.
Obtain the trophy prize in pachinko.
Play all minigames at Club SEGA.
Play all casino gambling games.
Play all non-casino gambling games.
Achieve a turkey in bowling.
Win the first point in Four-Ball pool.
Achieve a hat trick in darts.
Sing all songs at karaoke.
Become a VIP member at the massage parlor.
Acquire three Revelations.
Collect ten emblems from survivors during gang encounters.
Purchase five hand guns playing as Saejima.
Order something at least once at each restaurant.
Successfully hit two panels at once at the batting center.
Possess 10,000,000 yen or more.
Knock over 100 people you pass by.
Acquire 10,000 casino points playing as Tanimura.
Open five coin lockers.
Earn 1,000,000 yen playing as Akiyama.
Smash the ball three times in one match.
Traverse 100 kilometers or more.
Complete or finish forty substories.
Complete or finish twenty substories.
Complete or finish four substories.
Clear Normal Mode without reverting to Easy Mode.
Clear the Finale.
Clear Part 4 of the story.
Destroy 100 weapons you pick up playing as Kiryu.
Clear Part 3 of the story.
Pick up 20 pieces of trash around the city.
Clear Part 2 of the story.
Clear Part 1 of the story.
View all Reminiscences from YAKUZA to YAKUZA 3.
Acquire all trophies in the game.
Clear Extra Hard Mode.
Clear all Ultimate Skill missions.
Max out all characters to level 20.