RIKI-BAKA
(1) Kana: the Japanese phonetic alphabet.
(2) “So-and-so”: appellation used by Hearn in place of the real name.
(3) A section of Tōkyō.
[1] A square piece of cotton-goods, or other woven material, used as a wrapper in which to carry small packages.
(4) Ten yen is nothing now, but was a formidable sum then.