There is also a quest (last of the red quests for most people I believe) for collecting 3 hishimochi, then when completed, there is another to collect 10 more. I suspect there is probably another one after that to gain the Sentry.
Basically, don't need to post about Mochi stuffs in this thread anymore.
What is in here about Mochi? ummm....
New drop item 【菱餅】"Hishimochi" ◾ Can be obtained from world 3-3 and beyond
◾ Can also be obtained from the latter half of world 1
◾ Can be converted into various goods, including resources and "sweet flavours" ◾ If you gather more of them, you might be able to get even better rewards
◾ Skilled sentries can gather lots of hishimochis
But yea, I'll stop now. Just wanted to point out that the game update did, in fact, include stuff on mochis...now, I'm off to the Hishimochi thread...., oh and btw, you need to update that bullet point of Skilled sentries can gather lots of hishimochis to read "gathering lots of hishimochis can make skilled sentries available."