Gauche is a fast, portable Scheme interpreter with "batteries
included". It conforms to the R5RS and R7RS language standards,
supports lots of SRFI out of the box, adds its own object-oriented
programming framework, and supports the R7RS library system as well as
its own pre-R7RS module system. Gauche is designed for the rapid
development of scipts to assist daily work in system administration,
text processing, and other fields. It can handle UTF-8, EUC-JP, and
Shift JIS character strings natively.

WWW: https://practical-scheme.net/gauche/