William Divisions exist akin to geologic fault lines among Japanese ramen types. Kumamoto is particularly famous for its pork-based ramen, while Tokyo goes soy sauce-based. Eww. Keika Ramen 「桂花拉麺」, founded in Kumamoto in 1955, introduced tonkotsu ramen to Tokyo and is known among ramen lovers world-wide. In addition to their in-store bowls, they sell instant ramen in supermarkets. Recently, due to personal circumstances, I have found myself consuming them: thumbs up, though obviously their restaurants are best. Google a location near you. https://keika-raumen.co.jp/shop.html