Before you come to Japan it is better to apply for a ForEx card (sometimes also called Multi-Currency Travel Card) from Axis Bank or HDFC,etc.
・Benefits
-You can use it here in mostly all of the rest...aurants, shopping outlets, convenience stores or anywhere cards are accepted. One good thing about this card is unlike Credit and Debit cards, there is no extra charge associated with POS and e-commerce transactions. They are universally accepted and exchange rate is fixed. Moreover, there are no Dynamic Currency Conversion Charges.
・Just keep one thing in mind:
-You can also use this card to withdraw cash from ATMs all over Japan but there is a daily limit for cash withdrawal and you will have to levy the extra withdrawal charges and taxes.
My advice for you is to divide the ratio of Cash and foreign currency that you will carry in your Travel Card.
It is always better to carry some cash while travelling for convenience and emergencies.
You can go through this link if you need any more information regarding the TRAVEL CARDS :
https://www.wishfin.com/best-credit-cards/best-forex-cards-in-india/
I hope this was helpful!
Thanks