The best replacement for botan is keiko.

The best alternatives to botan are rated as following:
★★★★★  keiko

Your alternative for botan is not listed? Suggest!
Speaking about botan, one probably shouldn't forget about kurama.

Other search terms related to botan and their ratings are:
★★★★★ kurama
★★ hiei
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Google Trends

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botan
keiko