Nutrition of Komtan Soup

Have you ever wondered why a warm soup tastes so deeply comforting after savoring a premium Yakiniku dinner?

Hello, everyone. This is Sondo of Kuro5.

After enjoying our juicy Fresh Harami and thick-cut Wagyu tongue root grilled to perfection over binchotan charcoal, what do you choose as the grand finale of your dinner? While finishing with a cold bowl of Reimen noodles is refreshing, taking a warm, rich soup as your final sip brings a deep sense of satisfaction and comfort that spreads throughout your entire body.

Among all our soup offerings, the one we prepare with the utmost passion is our “Komtan Soup” (also known as bone broth). The reason your body naturally craves this warm soup after eating rich meats, and why it soothes your stomach so effectively, is backed by scientific principles rather than simple emotion.

Indeed, Kuro5’s Komtan Soup is often praised as a “drinkable skincare elixir” or a “natural multi-supplement” by health and beauty-conscious guests. Today, based on strict analysis data from the Food Environment Hygiene Research Institute, I would like to share the scientific nutritional properties and health benefits of our signature soup.

Our Meticulous High-Pressure Stockpot Brewing Method

Every single drop of the nutrition in our Komtan Soup comes from our uncompromising preparation process. Unlike many casual restaurants that dilute pre-made concentrates, Kuro5 brews its stock entirely from scratch daily.

We source selected domestic beef bones (Genkotsu) and domestic chicken feet (Momiji), which are packed with premium gelatin. We place them tightly into our special high-pressure stockpots, brewing them under intense pressure for hours until the marrow and bone structures completely break down. This pressure-cooking method extracts glycine, proline, and other vital amino acids locked deep inside the marrow that would never dissolve under normal cooking temperatures.

Particularly, chicken feet serve as an excellent source of collagen, adding a natural, velvety texture and mild sweetness to complement the powerful, rich flavor of the beef bones. This high-pressure extraction turns the soup into a creamy, milky-white elixir that is rich in umami and nutrients. This stock is the secret behind Kuro5’s dense, nourishing bone broth.

Only 0.3g of Sugars: Basic Nutrients Backed by Scientific Analysis

What exactly does this soup contain? According to official test results from the Food Environment Hygiene Research Institute, every 100g of our broth features the following nutritional values:

• Energy: 110 kcal
• Protein: 5.5 g
• Fat: 9.5 g
• Carbohydrates: 0.7 g (including 0.3g of Sugars and 0.4g of Dietary Fiber)
• Moisture: 84.1 g
• Ash: 0.2 g
• Salt Equivalent: 0.107 g (Sodium: 42 mg)
• Calcium: 0.7 mg

The most remarkable figure in this analysis is the extremely low sugar content of just 0.3g per 100g. This proves that the soup’s rich texture and flavor come entirely from natural amino acids, with zero artificial sugars or chemical additives. For guests practicing low-carb or ketogenic diets, this soup serves as an outstanding source of pure, clean energy.

Additionally, it provides a high protein content of 5.5g per 100g. Being high-protein and low-carb with a moderate energy value of 110kcal, it acts as a perfect recovery drink for tired muscles after exercise or a busy day.

The sodium level is also remarkably low, with a salt equivalent of just 0.107g. This is a fraction of the salt found in standard miso soups or broths, allowing health-conscious guests to drink every last drop completely guilt-free.

The “Drinkable Skincare Elixir” – 18 Essential Amino Acids

The main reason Kuro5’s Komtan Soup is called a “drinkable skincare elixir” is its rich concentration of essential amino acids that form the building blocks of collagen in our skin, joints, and blood vessels.

Our analysis detected 18 distinct amino acids per 100g of broth:

• Glycine: 1,200 mg
• Proline: 640 mg
• Glutamic Acid: 550 mg
• Alanine: 530 mg
• Arginine: 400 mg
• Aspartic Acid: 320 mg
• Lysine: 200 mg
• Leucine: 180 mg
• Serine: 150 mg
• Valine: 130 mg
• Phenylalanine: 120 mg
• Threonine: 110 mg
• Isoleucine: 92 mg
• Tyrosine: 49 mg
• Histidine: 44 mg
• Methionine: 37 mg
• Cystine: 8 mg
• Tryptophan: Less than 25 mg

The figures for Glycine (1,200mg) and Proline (640mg) are extraordinarily high. These two amino acids are critical for synthesizing collagen to maintain skin elasticity and moisture. Drinking a single cup of our Komtan Soup supplies these vital skincare nutrients in their most bioavailable liquid form.

Furthermore, glycine is scientifically recognized for improving sleep quality and regulating the nervous system. Glutamic acid (550mg) serves as the primary energy source for renewing gut lining cells. It protects and heals your stomach wall after a heavy meal. Additionally, Alanine (530mg) supports liver health, while Arginine (400mg) promotes blood circulation and Aspartic Acid (320mg) aids in clearing fatigue. It is a true powerhouse of recovery nutrients.

Harmonizing Palate and Gut Health After Charcoal-Grilled Wagyu

Enjoying Komtan Soup as a Yakiniku finale creates a highly logical dietary harmony.

At Kuro5, our trained staff provides tableside grilling, cooking your raw Fresh Harami and Wagyu cuts to perfection over binchotan charcoal. While this process renders out excess fat, eating a hearty meat dinner still puts your digestive system to work.

Finishing your meal with this warm bone broth supplies glutamic acid and glycine to stimulate digestive enzymes, promoting smooth digestion. The warm liquid improves blood flow to the digestive tract, preventing bloating and morning-after stomach heaviness. Drinking our sodium-restricted, rich soup leaves you feeling completely satisfied and refreshed the next morning. This balance is what makes Kuro5’s dining experience truly complete.

Enjoy the Taste of Our Devotion at Kuro5 Branches

Transforming beef bones and chicken feet into a nourishing elixir represents hours of labor and the sincere dedication of Kuro5’s chefs to your health and comfort.

Whether as a reward for yourself after a long week or the warm conclusion of a special dinner, let our rich bone broth restore your body from the inside out.

We are also pleased to announce that our signature premium bone broth (Komtan Soup) is now available for online order! Experience the rich flavors of Kuro5’s “Rich Soup” at home, simmered under high pressure and delivered frozen. Visit our order page below to bring the authentic taste of our restaurant to your dining table.

Order Kuro5 “Rich Soup” Online Here

Tonight, at our Main Branch (Honten), East Exit Branch (Higashiguchi), and Shinjuku Kabukicho Branch, we are ready with our signature soup and premium Wagyu, waiting to welcome you.

• Charcoal Yakiniku Kuro5 Main Branch (Honten)
  1F Nishi-Ikebukuro Bill, 2-46-3 Nishi-Ikebukuro, Toshima-ku, Tokyo / 5 min walk from JR Ikebukuro Station
• Charcoal Yakiniku Kuro5 East Exit Branch (Higashiguchi)
  1F Tsukiji Bill, 1-42-16 Higashi-Ikebukuro, Toshima-ku, Tokyo / 3 min walk from JR Ikebukuro Station East Exit
• Charcoal Yakiniku Kuro5 Kabukicho Branch
  1F Sankyo Akagawa Bill, 2-21-4 Kabukicho, Shinjuku-ku, Tokyo