Picking up JR Railways related merchandise and Gashapon while in Japan

[bc6]

I'm looking to pick up some Japanese-related merchandise while I'm in Japan, and I wanted to know where to go to that has the biggest selection. 

 

I also would like some JR or train-related Gashapon items as well, I know Japan has tons of Gashapon machines but I'm mainly interested in train stuff.

 

Thanks

[UnfinishedKit]

For gatchapon railway stuff I’ve had good pickings at:

 

Haneda T3 Keikyu line station

Biccamera Akihabara 

Narita T1 station has a big gatchapon centre outside the gate and some different stuff inside th JR gates

Keio department store in Shinjuku, Top floor by the lifts where the temporary exhibition space is. 
also keep a good eye out in the major stations on the private railways as they often have railway related gatchapon. 

 

for general JR merchandise, try the Suica store in Tokyo station or the New days in the maranouchi building in Tokyo station in the south west corner. IIRC that one is in the basement under the south exit gate. If there’s a JR stamp rally going on that’s where you go to get the book and they often have some special Tomix DecoKore stuff. 
 

For other fun merch. I really like Ojico for their t-shirts featuring Japanese trains, both my son and I have a bunch. Search online for their stockists.
 

Popondetta also does good t-shirts but their stock levels are crazy inconsistent and tend to favour child sizes. 

Train museums like the one in Omiya, the romancecar museum in Ebina and the Tokyo subway museum all have great gift shops.