At Giontsujiri's Tokyo Skytree Town Solamachi store, the autumn To go menu "Oimo Maccha" has been available since September 16th. The price is 780 yen (tax included).
This is an autumn-only soft serve ice cream that you can enjoy the taste of autumn, sweet potato and matcha. It contains plenty of autumn flavors such as caramel jelly, sweet potato mousse, brown rice flakes, red beans, sweet potatoes, and figs boiled in sweet potatoes.