Summary from postmark wikipedia - Japanese
[European language roller postmark - 欧文ローラー印］
Compared to the European round postmark, there are few post office that are deployed, and many collection and delivery post office are not deployed.
Mail items that are thick or may be damaged when cancellation, such as non-standard-sized parcels, parcels, and agricultural seedlings, and cannot be cancellation with ordinary round European postmark.
And, It’s used to cancellation a large number of stamps at once.
So I think it’s a hand.
[Japanese language roller potmark - 和文ローラー印]
I hope you understand my poor English.