As you all know, Matsuzaki Senmochi has moved to Ginza 5-6-9.
This year, for the first time, I visited the store and learned that a rice cracker called "Tokyo Marathon Week 2019 Shamitofu" is being sold.
Two pieces of rice crackers are wrapped in cellophane, one with the logo of "Tokyo Marathon Week 2019", and the other with an airship.
And when you buy this rice cracker, you can get two "TOKYO MARATHON WEEK 2019 logo and can badges designed for the city of Tokyo".
It's ￥324, including consumption tax. 
I put it on my hat right away.
By all means, be sure 
to buy it and support runners in Ginza, Kyobashi and Nihonbashi.
※The Tokyo Marathon 2019 will be held on March 3rd.
Click here for the website of Matsuzaki Senmochi. https://matsuzaki-senbei.com/
