If you want a translation tool that works well for Asian novels and can translate whole chapters at a time, Omni is a strong contender. It comes with a custom-trained Large Language Model that offers up to 4x better translation quality than other tools. With the Pro plan, you can translate up to 15K characters per translation, and it supports batch translations, so it's a good option if you have a lot of work to do.
Another good option is DeepL, which uses artificial intelligence technology to produce translations that are both accurate and natural-sounding. It translates Chinese and Japanese, as well as many other languages, and can handle text, documents and websites. It's not tuned for novel chapters, but it's got a lot of features and can handle long documents, so it's a good option if you want to translate lots of text.
If you're looking for a tool geared more toward documents, O.Translator offers high accuracy and preserves formatting for lots of file types. It translates more than 60 languages, and it's got features like cost-effective translation and private encrypted storage. It's good if you have documents with formatting you want to preserve, so your translations look right and are easy to read.
If you want a browser extension, Immersivetranslate translates web pages, documents and video subtitles. It doesn't have a chapter translation option, but it can translate lots of file types, and it can integrate with multiple translation engines. That's useful for researchers and students who want to get a quick translation without having to install a lot of software.