A quick github search indicates that Taiwan's laws might also be there at https://github.com/victorhsieh/tw-law-corpus using the https://github.com/g0v/twlaw exporter, Japanese laws seem to have been uploaded at https://github.com/riywo/law.e-gov.go.jp but just be a crawl/dump of law.e-gov.go.jp
A quick github search indicates that Taiwan's laws might also be there at https://github.com/victorhsieh/tw-law-corpus using the https://github.com/g0v/twlaw exporter, Japanese laws seem to have been uploaded at https://github.com/riywo/law.e-gov.go.jp but just be a crawl/dump of law.e-gov.go.jp