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While Japanese ramen culture enjoys global popularity, domestic ramen restaurant management faces unprecedented challenges: rising ingredient costs, soaring energy bills, and above all, severe labor shortages and the harsh physical demands of broth preparation.
The tradition of simmering broth for 24 hours — once the badge of a thriving ramen shop — has become a fatal business risk. This article explains how the “kitchen work style reform” and commercial pressure cookers offer a path forward for ramen restaurant management in the modern era.
The Heavy Prep Work Problem and Business Risks Facing Ramen Restaurants
The biggest challenge for ramen restaurant owners is the “time” and “physical burden” of broth preparation. Rich broths like tonkotsu and tori paitan present three major risks in today’s labor environment.
Difficulty Recruiting and High Staff Turnover in a Labor-Short Era
Ramen restaurant prep starts hours before opening, sometimes in the middle of the night or early morning.
- Normalized late-night and early-morning shifts
- Standing work in a scorching kitchen
- Hours of constant stirring and skimming
These conditions are the primary reason job postings attract few applicants. Staff who do get hired often quit early due to physical demands. Relying on skilled artisans creates a constant risk: when that person leaves, the restaurant can no longer maintain its signature flavor.
Ballooning Labor Costs from Long Working Hours
As labor compliance standards tighten, long staff hours translate directly into ballooning overtime costs. Having staff arrive hours early just for prep can cost several million yen per restaurant per year, significantly squeezing profit margins.
The Limits of Conventional Stock Pots for Broth Simmering
Why has prep become such heavy labor? The root cause lies in the physical limitations of the conventional stock pot (zundo) that restaurants have long taken for granted.
The 100 Degrees Celsius Limit: Time Needed to Extract Bone Umami
No matter how strong the flame, a conventional stock pot under atmospheric pressure cannot exceed 100 degrees Celsius internally.
To fully break down pork bones and chicken carcasses (marrow and collagen) and extract all their umami, 100 degrees requires 10 to 15 hours of simmering.
More time means continuously consuming both manpower to monitor the flame and gas.
Skilled Techniques Required: Stirring, Skimming, and Straining
Making broth in a conventional pot is not as simple as setting it on the heat and walking away.
Preventing scorching on the bottom: Rich broths cause bone and meat fragments to settle and burn. Staff must constantly stir vigorously from the bottom with a heavy metal spatula.
Skimming and straining: Carefully removing impurities to prevent off-flavors, then straining bones from broth using large colanders after completion, is grueling physical labor with a real risk of burns.
The Commercial Pressure Cooker: A Solution for Kitchen Modernization
The modern commercial pressure cooker solves these challenges of time, manpower, and cost through equipment innovation rather than sheer determination.
The Science of 120 Degrees Celsius Boiling Point from Sealed Construction
Commercial pressure cookers feature a fully sealed lid that raises the internal pressure (0.13MPa to 0.3MPa).
Higher cooking temperature: As pressure rises, the internal boiling point increases to approximately 120 degrees Celsius or higher.
Dramatically shorter cooking time: At 120 degrees and high pressure, heat transfer to ingredients speeds up dramatically. Tonkotsu broth that previously required 4 to 6 hours (sometimes 12 or more) is reduced to just 1.5 to 2 hours — effectively compressing cooking time to one-quarter of what it was.
Complete Automation Through Double Structure and Automatic Emulsification
The latest commercial pressure cookers manufactured by Meiwa Seisakusho incorporate advanced features to reduce on-site burden to zero.
Complete Prevention of Burning with Perforated Inner Pot
A stainless steel inner pot (basket) with countless holes is set inside the cooker in a double-structure design. Since ingredients never directly contact the heated outer pot bottom, the broth absolutely cannot burn no matter how rich it is. This makes constant stirring completely unnecessary.
Eliminating the Straining Process with a Dedicated Liquid Transfer Hose
After the broth is complete, simply connecting the built-in valve to the dedicated liquid transfer hose uses internal pressure to automatically move only the broth to a separate container. No need to flip a heavy pot for straining: just open the valve and the fully emulsified rich paitan broth (or clear chintan broth) flows out safely.
3 Business Benefits from Introducing a Pressure Cooker
Introducing a commercial pressure cooker is not merely replacing a piece of equipment. It represents a transformation of the restaurant’s business model, delivering three powerful benefits.
1. Reducing Labor Costs and Improving Working Conditions
With prep time cut to less than half and stirring and skimming eliminated, staff working hours drop dramatically.
Optimized scheduling: No longer necessary to hire dedicated late-night or early-morning prep staff.
Better working conditions: Reduced kitchen heat and physical labor lead to more job applications and higher staff retention.
2. Significant Reduction in Gas Costs
Gas expenses are a major fixed cost in restaurant operations.
Once a pressure cooker reaches boiling and builds pressure, only a low flame is needed to maintain the 120-degree, high-pressure state inside.
Compared to blasting on high heat for hours with a conventional pot, gas consumption is greatly reduced. Real-world case studies show gas bill reductions of approximately 50% per month at restaurants that have made the switch.
3. Complete Flavor Standardization
Unlike conventional pots where broth quality varies with the artisan’s intuition and daily temperature and humidity, pressure cookers operate in a completely sealed, controlled environment.
By standardizing ingredient weight, water volume, and pressurization time in a manual, even part-time staff can reproduce the same broth with identical concentration and umami every single day. For owners aiming to expand to multiple locations or centralize kitchen operations, eliminating flavor variation is the ultimate competitive advantage.
Conclusion: The Future Investment Successful Restaurants Should Make
In Japan’s ramen industry, spending time and effort has long been considered a virtue. However, in the modern era of severe labor shortages and rising costs, it is impossible to sustain a restaurant on spirit alone.
What must be protected is the deliciousness of the broth — not the grueling labor process itself. Wisely adopting pressure cooker technology, cutting prep time to less than half, reducing costs, and creating a better environment for staff: this is the condition for running a truly thriving restaurant that will be chosen and survive in the years ahead.
If you wonder whether a pressure cooker can really match the flavor of your current conventional pot, or whether it will fit in your kitchen, please visit our test kitchens in Tokyo and Osaka for a hands-on broth-making experience, or arrange a nationwide on-site demonstration to see the performance for yourself.