noun
Ichinen Yūhan (book by Nakae Chōmin)
Title of a work by Meiji-era thinker Nakae Chōmin; not a general vocabulary item.
中江兆民の『一年有半』は、明治時代の政治思想を論じた書物です。
Nakae Chōmin's 'Ichinen Yūhan' is a book discussing political thought of the Meiji period.
The title literally means 'one year and a half', but it is a proper noun referring to Nakae Chōmin's work; no further etymology is needed.