Silly question
 

Are there no Subways or Quiznos here ?

Are the Japanese not fans of subs or is it the companies just aren't interested/can't afford the Japanese market.

i've seen many subways...

Ah ok.

Just haven't seen any in my travels, not that I have a hankering for one I was just wondering with all the other chains being here.

Another one

Why aren't the 5 yen coins marked with a 5 ?

They are marked with the kanji for five, but not the Arabic numeral 5. Don't know why, but I suppose there's a reason...

Probably so you don't mistake it for a 50 yen piece :D

There are plenty of Subways. Sandwiches are popular in Japan.

Plenty of them in Tokyo. I don't see any down my way. If they're in Kyoto or Osaka, I haven't run across them.

Same with Burger King. I want some Burger King in my Kansai. :|

Tokyo has a lot of foreign/import things that you won't find anywhere else in Japan...

Yeah haven't seen any Burger King's here either in my neck of the woods (West Shinkjuku)

Just McD's and KFC's and the Friendly Kitchens

There is a BK in West Shinjuku. Ask your front desk how to get to the Island Tower, which is next-door to Shinjuku Hilton. BK is in the basement there.