I visited many countries thanks to the Japanese government international youth program. If you're between 18-30 years old youth, you might have a chance to apply for these program as a participant youth. "Ship for World Youth program" https://www8.cao.go.jp/youth/kouryu/en/swy/swy.html, "Ship for South East Asian and Japanese Youth program" https://www8.cao.go.jp/youth/kouryu/en/sseayp/sseayp.html
Thanks to this program, I've visited Thailand, NZ, Saipan, India, Fiji, Sri Lanka, Philippines, Brunei, Malaysia, Vietnam, and Indonesia.
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