What meds can you bring to japan?

Help!
I have been trying to find info about what meds i can and can not bring to japan (13Days) and now i have no idea, and am just scared that im going to get arrested and have been thinking that it would propably be the best to just stay away from that country since the chance of getting arrested even if your meds are legal are way too high (but i cant just not go there cuz my father has already paid for the vacation, so im kinda f*cked..)
So yeah.. The meds i need are: Propranolol. Hydrochlorid 10mg (Propral), Metylfenidathydroklorid 54mg (Concerta, Paracetamol 1000mg (Panadol Forte) and Tizanidin 2mg (Sirdalud).
If i bring those to japan, will they arrest me even if i have the papers from doctor explaining what they are for?
Cuz if so, i guess im gonna have to just try and see if i can manage without them (Its gonna be hell 😬)
Also if i cant bring them to japan, is it possible to buy their meds there somehow? Like meds that would be kinda similar to the ones i have to be using? I hate how i cant just figure this shii out by myself and have to ask others..🥲

by dx_sikhuim