Authentic Japanese ramen with standout tonkotsu broths in a tiny, lively Chamberí spot; reserve ahead and expect moderate prices, great flavors, tight seating, and some portion and vegetarian limitations.
Ramen KOTSU x KOTSU delivers exceptional tonkotsu broths with careful, classic execution and warm, knowledgeable service that justify an A-grade standing. However, very tight seating and cramped conditions combined with occasional portion inconsistency prevent the higher distinction—this is a destination for ramen purists willing to trade comfort for authenticity, not a comprehensive dining experience.
One caveat: Very tight space and noticeable noise at peak times; time limits enforced