The Iroha is a Japanese poem. Originally the poem was attributed to Kūkai, the founder of Shingon Buddhism, but more modern research has found the date of composition to be later in the Heian period.
Firefighters' insignia organized according to the Iroha
Okinawan is a Japonic language spoken on Okinawa Island. Okinawan-language documents of the Ryukyu Kingdom were written in kanji and hiragana, derived from Japan.
An example of traditional Okinawan writing circa 1471 written in Japanese Epistolary style (候文)