1-Collect all of the telephone cards
2- do all of the substories (all of them including business ones)
3- play pool in Vincent 3 times to get the last erotic video
4- watch the erotic videos only after you have done the last 3

1- you can go to your inventory and go to Valuables to look at the telephone cards you have collected,
each page has 6 slots, 3 slots in the top and bottom, each for 1 Actor.
The cards of each actor appear on the map in order, meaning in order for the second card of for example Rita ito to appear, you have to hunt down the first one and in order to get the third card, you have to have the second card already.

2- Cyricz guide[gamefaqs.gamespot.com] provides the location of all cards in sotenbori and kamurocho, i recommend opening them in photoshop and crossing them out one by one after visiting the locations in game.

3- goes without saying to use the Card Watcher item

Train the girls everytime you have the option to prepare for opening.
If you finish the cabaret stuff first it will become very painful to have to sit through pointless openings of the cabaret over and over again to get to finish the hostess substories.

Jo amon tip: Find the thug necklace in the equipment searches or the spring and when the fight starts, use this gentleman's technique
You have to practice that perfect throw quite a bit but you'll get there

get kiryus golden gun and majimas golden shotgun and equip them in different fighting styles in order to hit the "Defeat X amount of enemies in Y style " Completion points alot quicker
Dont forget to equip Items such as the Champions ring to make more enemies come after you.

https://steamproxy.com/sharedfiles/filedetails/?id=2831303827

There are 6 items that everyone mostly has problems with obtaining,
User Tyndis on a gamefaqs thread has mentioned the place they can be found:

Dry Branch /
Carved Wooden Bear
Japan; The Hanafubuki Family, Hunters' Village
N. America; Grand Canyon, Rocky Mountains
S. America; Brazilian Mafia

Animal Skin
Japan; Neo Japan Kinki Branch - TV Personality

Sturdy Thread
Japan; Neo Japan Kinki Branch, The Hanafubuki Family
N. America; Sushi Bar BANZAI
S. America; Jungle
W. Asia; Ganges Delta, Liberation Army Camp
W. Europe; Soccer Stadium

Straw Effigy /
Happy Doll
N. America; Inuit Village, Rocky Mountains, Secret Base in Nevada

...
the thing with these items is, they are common items and the more money you put in, the harder it becomes to get them.
You shouldnt add any funds to your equipment search and just wait the 3-4 minutes for the items, its worth it.


how to know which items youre missing?
They[psnprofiles.com] listed out all the equipment parts here in order, just go to your inventory> parts and check which ones you dont have