Binary package “freepwing” in ubuntu focal

EB to JIS X 4081 converter

 This program translates data in various "Electric Book" (popular in
 Japan) formats into a single JIS X 4081 format. JIS X 4081 is a
 subset of the EPWING V1, which is the standardized format for electric
 publishing. Thus after conversion, you can read such data with your
 favorite EPWING viewer without worrying which formats your data
 originally were.