Another reason is that the UK forbids the child to have different names on their japanese passport and their UK passport, which is often (almost always?) the case
if you want to know, it's a fork of google gyp, which is a C/C++ project/build system generator. I.e. it's a bit similar to CMAKE, a tool to describe native code projects and what needs to be built in order to make executables and dlls.
It's a python codebase, largely abandoned by google. They used to use it for building Chrome.