ICHIRAN was the first to add a spicy red sauce directly onto ramen. We make our special chili sauce by blending together 30 different spices and ingredients and aging it over days and nights. This allows the sauce to develop a richer, more complex flavor that enhances our ramen.​ ​

Our creamy soup is made using a technique developed by our craftsmen through years of research to draw out the robust flavors of the pork bone broth.​ ​
Our unique process is applied in the 2 stages of production and cooking to completely remove any impurities, leaving only a delicious tonkotsu broth without the unique smell peculiar to tonkotsu.

経験豊かな麺職人が独自ブレンドした小麦粉を、その日の天候・気温・湿度を考慮し、毎日製麺・熟成させております。小麦のたんぱく質などの成分に至るまで細かくチェックを行い、使用する水は季節によって温度を変えております。
Since fresh noodles are very delicate, we make sure that our noodles are handled with extreme care. The finished products are stored in special boxes so they are not exposed to air until they go into the noodle boiler. Even when our restaurants are at their busiest, we limit the quantity of noodles that we take out of the special boxes to sit at room temperature.​ ​
The temperature of the noodle boiler is always maintained at a consistent level with the use of special sensors. We also carefully control the quantity of hot water added to the boiler (i.e. only 110-150 cc every ten seconds) to ensure that the water in the boiler stays clean.​ ​
Because our noodles are very delicate, we drain the noodles using a noodle shaker, shaking it exactly 3 times - never more or less. We will never serve noodles that do not meet our standards to our guests. 

We use the purest filtered water in everything we do. From preparing the soup and noodles to cooking the rice, and even drinking water and water used to cook noodles in our kitchens. We call this water the “springs of noodle vitality.” These “springs” bring out the natural flavor of the ingredients used in the noodles, impart them with a nice toothy texture, and ensure that they will not go limp in the hot broth. This water is absolutely essential to making a delicious bowl of ramen. Furthermore, it absorbs well in the body and will not put strain on the stomach, making it perfect as drinking water, too. We make no compromises when it comes to providing you with food that is safe and with peace of mind.Our water brings out the natural flavor of the ingredients, give our noodles a chewy texture and even helps the noodles maintain their texture in the hot broth. Our filtered water is gentle to your stomach, making it the perfect drinking water. We make no compromises when it comes to serving quality food that is both delicious and safe to enjoy.