Answered

A runner’s name or nickname (up to five 2 byte characters*) may be printed on a race bib for a fee of 500 yen. Applications for printing company or commercial product names or any other designations deemed inappropriate by the organizers may not be accepted.
*In the case of alphabetical and numeric characters, up to ten 1 byte characters may be printed, but character size will be smaller.
*To help runners receive more cheers, it is possible to print a runner’s name or nickname in Japanese katakana characters upon request. (Please note that katakama conversion will be left up to the organizers and that changes and other requests may not be accepted.)