Block: Katakana Phonetic Extensions

Range U+31F0 - U+31FF
Official Chart http://www.unicode.org/charts/PDF/U31F0.pdf
Wikipedia Katakana Phonetic Extensions is a Unicode block containing additional small katakana characters for writing the Ainu language, in addition to characters in the Katakana block.
Further small katakana are present in the Small Kana Extension block.
https://en.wikipedia.org/wiki/Katakana_Phonetic_Extensions
Characters