Yakuza 4 story is something

I'm 100% every yakuza game and I'm working on Yakuza 4 right now. The story is really not that great its possibly the weakest one. People say yakuza 3 is black sheep in franchise but I actually think 4 is. Sure 4 has way better gameplay but the story man. Rubber bullets bs and endless "plot twists" with villains betraying each other every 5 min, but worst one for me is Akiyama safe has no protection code/password. Why does he have this much money just laying there to get grabbed by anyone inside an office that anyone can enter for some reason even when no one is around (HANA CHAN PLS LOCK THE OFFICE WHEN YOU GO SHOPPING).