AFURI
The name AFURI comes from a mountain in Kanagawa prefecture. The name is Mt. Ohyama(大山 that is commonly called Mt. Afuri(阿夫利山). They say they use water of the clear stream of Mt. Afuri.
The appearance of the ramen is beautiful and popular with ladies. One of popular rame there is Yuzu shio ramen(柚子塩ラーメン). Yuzu means a citron and shio means salt.
As a point to note they serve ramen for vegan. It's very rare. They say it's 100 percent vegetable-based btoth, vegetables and wheat noodles blended with lotus root.
The link of the website is shown below.
IPPUDO (一風堂)
Ippudo was established in Hakata (博多) in Kyushu (九州) area. Ippudo serves Tonkotsu (豚骨) Ramen. The broth for Tonkotsu Ramen is made from pig bone and other ingredients.
They serve gyoza (餃子) and chahan (炒飯) and so on other than several kinds of ramen.
Ippudo has a lot of their shops all over Japan.
The link of the website is shown below.
ICHIRAN (一蘭)
Ichiran was established in Fukuoka (福岡) in Kyushu (九州) area in 1960. It has about 90 resuaurants all over Japan.
The Ramen of Ichiran is Tonkotsu(豚骨) taste. And you can order many kinds of additional toppings like Chashu(チャーシュー meaning sliced roasted port fillet) Negi(ネギ meaning green onion) Nori(海苔 meaning dried seaweed) and so on.