This mod replaces the majority of Lies Of P's soundtrack with tracks from Sega's Yakuza game series, along with a few Easter eggs along the way!
Please see the following description for which songs are changed to which:

[Bosses]
Parade Master Phase 1 - Division of Steel
Phase 2 - Pellagra

Scrapped Watchman - Kooky

Generic Boss  - War Maker

Fuoco King's Flame - Sorrowful Blade

Archbishop Phase 1 - Palekanian Dance
Phase 2 - Impersonation 

Brotherhood Fight 1 - Receive You The FOTNS

King of Puppets - Deadly Struggle
Romeo - Knife Elevator

Victor - Loyalty Oath
Victor 2 - GEAR

Green monster Phase 1 - Rake Your Inside
Phase 2  - Soul of the Ogre

Corrupted parade master - Barracuda

Brotherhood 2 - Impregnable Triangle

Laxasia the Complete Phase 1 - Brutality
Phase 2 - Brutality Rebuild

Manus 1 - End of Denial
Manus 2 - Self Embodiment of Perfection

Nameless puppet - Bug Warrior

[Ambience & Misc]
Hotel Krat - - New Serena

Alchemists run - - Reiwa Labyrinth

Old French song - - Kamurocho Lullaby

Death sound - - Akiyama dame da nae

Main Menu - Wounded Beast

Piano - Max Payne 3 theme

[Records]
Divine Service* - - Judgment
Feel* - - Hands
Someday* - - Honolulu City Lights
Fascination* - - Hell Stew Mafia
Far east princess - - Sad Joon Gi Song
Proposal flow etc - - Pure Love in Kamurocho
Beach* - - The Future I Dreamed Of
Quixotic* - - Machine Gun Kiss
Why - - AWAKE
Misty E'ra - - Dame Da Nae 
Shadow Flower* - - Baka Darou
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Proposal flower golden - - Like A Butterfly
Quixotic golden - - Tonight is a Diamond
Shadow flower golden - - Zetsbou
Beach golden - - I E LOVE YOU
Fascination - - TONIGHT