Click the image to enlarge
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Now, this work exists only in the digital realm.
Please give the craftsman the opportunity to create something real.
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Manufacturing begins only when this crowdfunding succeeds.
Third-generation artisan Munehiro Kamiakwa will then start crafting.
✨ Become the first owner in the world
🔨 Support the artisan's challenge
📖 Acquire a lifetime heirloom
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✓ 99.9% pure silver
✓ Lifetime quality, passed down through generations
Mass-produced cutlery: A few thousand yen → Replace in years → Value drops
Artisan pure silver: Tens of thousands yen → Use for life → Value increases
Imagine 10 years from now.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Third-generation artisan Munehiro Kamiakwa will then start crafting.
✨ Become the first owner in the world
🔨 Support the artisan's challenge
📖 Acquire a lifetime heirloom
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✓ 99.9% pure silver
✓ Lifetime quality, passed down through generations
Mass-produced cutlery: A few thousand yen → Replace in years → Value drops
Artisan pure silver: Tens of thousands yen → Use for life → Value increases
Imagine 10 years from now.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
ONJIN (温刃) -Butter Knife
Hard butter melts with your body warmth.
Pure silver delivers a stress-free morning.
Your Warmth, Perfect Spread.
【What You Will Experience】
Fresh baguettes and croissants, never crushed.
Cold butter straight from the refrigerator gradually softens to perfect spreadability—simply by holding the knife. Your body warmth does the work.
A small daily frustration transforms into an elegant moment.
Solving the Universal "Hard Butter Problem"
Anyone who loves bread and butter knows this moment.
Hard butter tears the bread. Waiting is tedious.
ONJIN solves this universal problem using the simplest energy source: your body warmth.
Fresh baguettes and croissants, never crushed.
Cold butter straight from the refrigerator gradually softens to perfect spreadability—simply by holding the knife. Your body warmth does the work.
A small daily frustration transforms into an elegant moment.
Solving the Universal "Hard Butter Problem"
Anyone who loves bread and butter knows this moment.
Hard butter tears the bread. Waiting is tedious.
ONJIN solves this universal problem using the simplest energy source: your body warmth.
【Why Pure Silver?】
・Thermal conductivity: 420 W/(m·K) — 26 times that of stainless steel.
Your hand's warmth instantly transfers to the blade edge.
・Calculated design
The thin blade efficiently conducts heat. The hammered handle provides slip resistance, comfortable grip, and heat retention.
Self-Contained Solution, No Power Required
ONJIN needs no external power source or battery.
Only your body warmth—the most natural and sustainable energy source.
Simply hold it, and the blade warms to gently soften butter.
Elegant problem-solving without technology.
・Thermal conductivity: 420 W/(m·K) — 26 times that of stainless steel.
Your hand's warmth instantly transfers to the blade edge.
・Calculated design
The thin blade efficiently conducts heat. The hammered handle provides slip resistance, comfortable grip, and heat retention.
Self-Contained Solution, No Power Required
ONJIN needs no external power source or battery.
Only your body warmth—the most natural and sustainable energy source.
Simply hold it, and the blade warms to gently soften butter.
Elegant problem-solving without technology.
【Tokyo Silverware: A New Challenge】
A craftsman carrying on the tradition of Tokyo Silverware dating back to the Edo period responded to bread lovers worldwide facing the "hard butter problem,"
pursuing a butter knife that maximizes pure silver's physical properties.
Minimal form born from functional necessity.
Hammered handiwork adds warmth that grows familiar with each use.
ONJIN was born.
A craftsman carrying on the tradition of Tokyo Silverware dating back to the Edo period responded to bread lovers worldwide facing the "hard butter problem,"
pursuing a butter knife that maximizes pure silver's physical properties.
Minimal form born from functional necessity.
Hammered handiwork adds warmth that grows familiar with each use.
ONJIN was born.
Breakfast, Transformed
ONJIN is not merely cutlery.
It is functional beauty that solves everyday frustrations.
For everyone who loves bread and butter.
ONJIN is not merely cutlery.
It is functional beauty that solves everyday frustrations.
For everyone who loves bread and butter.
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【Specifications】
Material: Pure silver (SV1000)
Dimensions: Length 120mm × Max width 20mm
Weight: Approx. 50g
Origin: Tokyo (Tokyo Silverware)
Care: After use, wash with a soft sponge and mild detergent, then dry thoroughly. Do not use dishwasher. Develops richer character over time.
Durability: Lifetime quality.
【Specifications】
Material: Pure silver (SV1000)
Dimensions: Length 120mm × Max width 20mm
Weight: Approx. 50g
Origin: Tokyo (Tokyo Silverware)
Care: After use, wash with a soft sponge and mild detergent, then dry thoroughly. Do not use dishwasher. Develops richer character over time.
Durability: Lifetime quality.
【Accessories】
Special Paulownia box
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※The images are concept images generated by AI. They may differ from the actual product. There may be slight color differences and changes in specifications without prior notice. Thank you for your understanding.
Special Paulownia box
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※The images are concept images generated by AI. They may differ from the actual product. There may be slight color differences and changes in specifications without prior notice. Thank you for your understanding.
Other Products from this Shop
Support Total
¥134,000
¥134,000
Supporters
4people
4people
Goal Amount ¥2,200,000
This project uses the All-or-Nothing model (proceeds only if the target is met). Your purchase is confirmed only if the target amount is reached and payment is completed by 2025年12月06日 23:59. If the target is not met, you will receive a full refund.
Days remaining until crowdfunding ends
▼Return List
ONJIN (温刃) -Butter Knife
Limited Special Offer (25% OFF)
¥30,500 （Tax Included）
×
Shipping & Delivery Methods
Hokkaido
¥1,440
Tohoku region
¥1,040
Kanto region
¥910
Chubu region
¥910
Kinki (Kansai) region
¥1,040
Chugoku region
¥1,180
Shikoku region
¥1,300
Kyushu region
¥1,440
Okinawa region
¥1,914
×
Shipping & Delivery Methods
United States
¥3,640
United Arab Emirates
¥6,610
Argentina
¥6,610
United Kingdom
¥4,960
Italy
¥4,960
India
¥7,380
Indonesia
¥3,420
Egypt
¥6,610
Australia
¥7,380
Austria
¥5,400
Netherlands
¥4,960
Canada
¥3,640
Cambodia
¥10,020
Greece
¥5,400
Kenya
¥6,940
Saudi Arabia
¥6,610
Singapore
¥3,420
Zimbabwe
¥6,940
Switzerland
¥5,400
Sweden
¥5,400
Spain
¥4,960
Thailand
¥3,420
Denmark
¥5,400
Germany
¥4,960
Turkey
¥6,610
New Zealand
¥7,380
Nepal
¥7,380
Pakistan
¥6,610
Philippines
¥3,420
Puerto Rico
¥3,640
Brazil
¥6,940
France
¥4,960
Brunei
¥10,020
Vietnam
¥3,420
Portugal
¥5,400
Macau
¥3,420
Malaysia
¥3,420
Mexico
¥3,640
Maldives
¥10,020
Mongolia
¥10,020
Jordan
¥6,940
Laos
¥10,020
Russia
¥6,940
China
¥3,420
South Africa
¥6,940
Taiwan
¥3,420
South Korea
¥3,420
Hong Kong
¥3,420
ONJIN (温刃) -Butter Knife
Regular Price
¥40,500 （Tax Included）
Important Notice for Supporters
Please review the support amount and the details of the return carefully.
Once your support is completed, it cannot be canceled or changed.
About the delivery of returns and handling of support funds
Please check the scheduled delivery time of the return in advance (it may be set several months after your support).
This project follows the All-or-Nothing model (executed only when the goal is reached).
The project will be executed, and your payment will be processed only if the total amount of support reaches the funding goal.
If the goal is not reached, your payment will not be processed and the full amount will be refunded.
About the support agreement
The support agreement is concluded between the project owner and the supporter.
Therefore, ITOSHIO is not responsible for the quality, content, or delivery of the returns provided by the project owner.
Please review the support amount and the details of the return carefully.
Once your support is completed, it cannot be canceled or changed.
About the delivery of returns and handling of support funds
Please check the scheduled delivery time of the return in advance (it may be set several months after your support).
This project follows the All-or-Nothing model (executed only when the goal is reached).
The project will be executed, and your payment will be processed only if the total amount of support reaches the funding goal.
If the goal is not reached, your payment will not be processed and the full amount will be refunded.
About the support agreement
The support agreement is concluded between the project owner and the supporter.
Therefore, ITOSHIO is not responsible for the quality, content, or delivery of the returns provided by the project owner.