Restaurants - 
A lot of Restaurants have picture menus  . The more local restaurants/izakayas are Japanese language only ,dont take offence that you may not be able to get a table , 
the Japanese tend to not want to cause offence because they dont speak English , so its less offesive if they dont 
interact with a non japanese speaker
Use a translator app or learn a few simple phrases ( this really helps)
Tipping
Tipping is Not a practice , dont try and do it , refusal may lead to offence.
Otoshi -   is a small appetizer given once you place an order at a bar .You can think of a it like a cover charge, table charge, 
or service charge that comes with some food in return. 
It might be a bowl of nuts,fried chicken skin,  edamame, rice crackers, miso soup, picked vegetables or  tofu , it will vary .
It’s primarily seen in bars, izakaya, and restaurants where the primary theme of the place 
leans more toward drinking . It will not likely be on the menu , it will just be served. Its an accepted custom , you will not see in
family restaurants , food focused places or fast food chains
Its not a scam  , its the way that bars work ( and izakayas ). Its generally between 300 to 800 yen.