A4-Sized 'Portable Microwave' Emerges! New 'HOT PORTER' Heats Lunch Boxes Directly, Pre-sale on Makuake
Mitsutani Electric launches 'HOT PORTER' on Makuake, a portable heating bag that can warm up lunch boxes in about 4 minutes to 80°C using a mobile battery or AC power.
📋 Article Processing Timeline
- 📰 Published: April 23, 2026 at 19:00
- 🔍 Collected: April 23, 2026 at 10:31
- 🤖 AI Analyzed: April 24, 2026 at 02:20 (15h 49m after Collected)
HOT PORTER: A heating bag just like a microwave.
Mitsutani Electric Co., Ltd. (Headquarters: Tsubame City, Niigata / CEO: Ken Mitsutani) has developed the 'HOT PORTER,' a portable heating bag that allows you to warm up convenience store bento or home-cooked meals anywhere.
Pre-sales will start on the crowdfunding site Makuake from 10:00 AM on April 23, 2026. Compatible with mobile batteries and capable of heating up to approximately 80°C in about 4 minutes, this product is suitable for a wide range of uses, including outdoor activities, car camping, lunch for sales professionals and drivers, and emergency evacuation situations.
■ An 'Evolved Version' Born from the Response to the Previous Model
This product is a new item developed based on user feedback from a previous Makuake project for an A4-sized portable heating pouch, which attracted more than 1,500 supporters and over 20 million yen in backing. In response to the need to 'warm up lunch boxes directly,' the size has been expanded from the conventional model, evolving into a specification that allows convenience store bento and home-cooked lunch boxes to be heated as they are in their containers.
■ A New Choice: 'Hot Meals Anywhere'
HOT PORTER provides a new dining experience where you can warm meals anywhere as long as you have a power source, without using water or fire. It is particularly supported in scenes such as meal breaks for long-distance truck drivers, car camping and outdoor scenes, lunches on the go for sales professionals, outdoor meals during sports activities, and emergency evacuation. This product significantly changes the dining experience in places where 'hot meals' were previously given up.
■ Actual User Feedback
Previous users commented: 'I can now eat warm lunches anywhere,' 'I am very satisfied to be able to eat warm rice even in a cold car,' and 'It's great to be able to warm up retort food and enjoy curry rice at camp.' In response to voices saying 'I want to use it for lunch box sizes,' this size upgrade was achieved.
■ Product Features
- Heat convenience store bento or home-cooked meals 'as they are': Realized compatibility with lunch box sizes, which was difficult with conventional models. You can put in meals directly in their containers, eliminating the trouble of preparation or transferring food.
- Reaches approx. 80°C in about 4 minutes, properly 'piping hot': A unique heating structure allows the temperature to rise significantly in a short time. Cold bento or retort food can be finished at a satisfying warmth.
- Mobile battery compatible: Since it supports mobile batteries as well as household power supplies, it can be used regardless of the power environment, such as inside a car or outdoors.
- PC bag size design: Designed to be approx. 30cm square for easy daily carrying. It fits easily into business bags or cars.
■ 'Phase-free Appliance' for Work, Outdoor, and Disaster Prevention
HOT PORTER is suitable not only for leisure such as outdoors and car camping but also for the daily use of business persons. Furthermore, being able to secure hot meals using power sources like mobile batteries during disasters or power outages leads to psychological peace of mind as well as physical satisfaction. It serves as a 'phase-free' appliance that seamlessly connects daily life and emergencies.
■ Product Specifications
Power: AC100V 50/60Hz (with included AC adapter)
Size: 280 x 300 x 75mm (Inner: 280 x 280mm)
Exterior Color: Black
Interior Color: Black (Stain-resistant/water-repellent Teflon Twill)
Weight: Approx. 380g
Compatible Power: 18W-36W
Rated Input: DC12V/Max 3A (36W)
Mitsutani Electric Co., Ltd. (Headquarters: Tsubame City, Niigata / CEO: Ken Mitsutani) has developed the 'HOT PORTER,' a portable heating bag that allows you to warm up convenience store bento or home-cooked meals anywhere.
Pre-sales will start on the crowdfunding site Makuake from 10:00 AM on April 23, 2026. Compatible with mobile batteries and capable of heating up to approximately 80°C in about 4 minutes, this product is suitable for a wide range of uses, including outdoor activities, car camping, lunch for sales professionals and drivers, and emergency evacuation situations.
■ An 'Evolved Version' Born from the Response to the Previous Model
This product is a new item developed based on user feedback from a previous Makuake project for an A4-sized portable heating pouch, which attracted more than 1,500 supporters and over 20 million yen in backing. In response to the need to 'warm up lunch boxes directly,' the size has been expanded from the conventional model, evolving into a specification that allows convenience store bento and home-cooked lunch boxes to be heated as they are in their containers.
■ A New Choice: 'Hot Meals Anywhere'
HOT PORTER provides a new dining experience where you can warm meals anywhere as long as you have a power source, without using water or fire. It is particularly supported in scenes such as meal breaks for long-distance truck drivers, car camping and outdoor scenes, lunches on the go for sales professionals, outdoor meals during sports activities, and emergency evacuation. This product significantly changes the dining experience in places where 'hot meals' were previously given up.
■ Actual User Feedback
Previous users commented: 'I can now eat warm lunches anywhere,' 'I am very satisfied to be able to eat warm rice even in a cold car,' and 'It's great to be able to warm up retort food and enjoy curry rice at camp.' In response to voices saying 'I want to use it for lunch box sizes,' this size upgrade was achieved.
■ Product Features
- Heat convenience store bento or home-cooked meals 'as they are': Realized compatibility with lunch box sizes, which was difficult with conventional models. You can put in meals directly in their containers, eliminating the trouble of preparation or transferring food.
- Reaches approx. 80°C in about 4 minutes, properly 'piping hot': A unique heating structure allows the temperature to rise significantly in a short time. Cold bento or retort food can be finished at a satisfying warmth.
- Mobile battery compatible: Since it supports mobile batteries as well as household power supplies, it can be used regardless of the power environment, such as inside a car or outdoors.
- PC bag size design: Designed to be approx. 30cm square for easy daily carrying. It fits easily into business bags or cars.
■ 'Phase-free Appliance' for Work, Outdoor, and Disaster Prevention
HOT PORTER is suitable not only for leisure such as outdoors and car camping but also for the daily use of business persons. Furthermore, being able to secure hot meals using power sources like mobile batteries during disasters or power outages leads to psychological peace of mind as well as physical satisfaction. It serves as a 'phase-free' appliance that seamlessly connects daily life and emergencies.
■ Product Specifications
Power: AC100V 50/60Hz (with included AC adapter)
Size: 280 x 300 x 75mm (Inner: 280 x 280mm)
Exterior Color: Black
Interior Color: Black (Stain-resistant/water-repellent Teflon Twill)
Weight: Approx. 380g
Compatible Power: 18W-36W
Rated Input: DC12V/Max 3A (36W)