We also hint at how to easily win the battle on the ship against the RK members.
After you wake up, go to the Charles gaming arcade, then to the Earth Angel bar.
When you reach the building with the Tatami Room, you will face a battle against some RK members.
Return to the hallway and go to the adjacent room.
Then go back to the previous room anduse the code 0508 to launch the door.
Use the next pipes and jump to the very top.
Keep moving left until you reach the window.
The door in the room will turn out to be locked.
Go back out the window and use the pipe on the left to go right.
Jump down and walk to the right, hanging from the vent pipe.
Crawl through the small opening and head below by making a running jump down the pipe.
When you reach the top, you will be attacked by 2 RK members.
After winning the battle, walk up and look at the rope lying near the edge of the roof.
Once your Companions have climbed up, walk over the small railing to the next part of the roof.
Flip a coin to distract the man in the blue jacket.
When he is leaning over the coin, walk up to him and press Triangle/Y.
Go along the east side of the roof and dispose of the next RK member.
Walk up to the checkpoint, then jump to the nearby roof.
Eliminate the man in the blue jacket.
You will find the next checkpoint on the northeast side of the roof.
Dispose of the man standing by the door.
Go down the stairs to the 5th floor and enter through the door.
Before entering the Tatami Room, walk up to the lamp and save the game.
Once you enter the room, the fight with the RK members will begin.
After winning the battle, return to your office and relax on the couch.
Once you arrive at the location, you will have to wait for a phone call.
Leave the office and complete a side quest or wait a while.

When Kuwana phones you, go to Liumang headquarters.
After the conversation, follow Tesso into a small room.
Put on any outfit and use the underground passage.
After leaving the sewer, walk towards Yoko Sawa’s apartment.
Each will be equipped with baseball bats.
The strongest opponent named Shimazaki has as many as 4 health bars.
Defeat the regular enemies first, and then deal with the main opponent.
Shimazaki will pull out a gun at some point.
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