Visiting a Town with Mitsubishi Materials 〜Fuji-Oyama Plant edition〜
Ms. Stride, a woman traveling around the world, visits a town where a Mitsubishi Materials Group hub is located.

Navigator
Ms. Stride
A woman in her late twenties who enjoys factory tours and strolls around town.
Fuji-Oyama Plant edition
In this edition, we will introduce the town in which Fuji-Oyama Plant, Mitsubishi Materials Corporation, resides. The plant produces insulated heat dissipation substrate, an essential for electric vehicles, solar power generation, and more.
Oyama Town, located in the most northeastern part of Shizuoka Prefecture, is known as a “Mt. Fuji town,” situated at the foothills of the mountain. Here, you can see not only the bountiful nature nurtured by Mt. Fuji but also a variety of attractions.

Homon Park
A park where local history comes alive
A park where local history comes alive
The park was built by the old Fuji Spinning Co., Ltd., who laid the foundation of Oyama Town’s modernization, and has been maintained in cooperation with the town and townspeople. Within the park is a registered tangible cultural prop- erty that was once the residence of Fuji Spinning’s first president—the Homon Kaikan. One can enjoy strolling through the park filled with flowers and trees.

Fuji International Speedway
Much more to enjoy than just viewing races!
Much more to enjoy than just viewing races!
This circuit hosts car and motorbike races. It also has a variety of events in addition to races. Fuji-Oyama Plant employees participated in the Super Mama- chari Grand Prix, and the competition was heated.

The birthplace of Kintaro
The pride of Oyama Townspeople
The pride of Oyama Townspeople
Oyama Town is the birthplace of the famous folktale hero Kintaro. The town has numerous places associated with Kintaro, including parks and shrines, attracting lots of attention as a tourist spot. There are also statues of Kintaro throughout the town.

Clean natural water is the town’s treasure
Many blessings from nature
Many blessings from nature
Oyama Town’s local specialty is mizukakena, a leafy vegetable grown using natural water from Mt. Fuji. The town’s natural water is a popular drinking water. It is also home to many fireflies, which enjoy clean water.

Mt. Fuji is visible from the plant!
About Fuji-Oyama Plant
The plant produces insulated heat dissipation substrate for automobiles, and its predecessor, Sanda Plant’s Shizuoka DBA Center, was established in 2004. In 2022, there was a change in jurisdiction and the center became the Fuji-Oyama Plant. Currently, the main product is insulated heat dissipation substrate, which plays a key role in the heat management of next-generation automobiles and other equipment. The plant is an all-in-one base with all functions necessary to business operations that handles not only manufacturing and sales but also the design of new products and strategy development.

Insulated heat dissipation substrate
An essential for automobiles
An essential for automobiles
Electric vehicles use more than 10 times the amount of electricity of the average household. This means that the semiconductor in a vehicle’s power module releases a large amount of heat. Insulated heat dissipation substrate is necessary to allow heat to escape quickly because the automobile will malfunction if too much heat accumulates. The substrate is produced by directly bonding high purity aluminum to both sides of a ceramic substrate.


I see! Lots of electricity is being used, so it is important to allow the heat to escape.
Ultrasonic inspection to check the condition of the adhesive layer
After the aluminum and ceramic plates are assembled and bonded, we check the adhesive layer. Using ultrasonic waves, we inspect whether there are any spots that are insufficiently bonded.

Ensuring reliable quality through visual inspections
Employees perform visual inspections in addition to all the checks done by machine. It is due to this ensured quality and strong trust that this substrate is used as a part of many automobiles and industrial machines worldwide.


Guide
General Affairs Group,
Administration Dept.
Tomomi Tsuchiya
Joined the company in 2020. Is in charge of general affairs and accounting. Her favorite local dish is the mikuriya soba at Inaka Ryori-Miya. She enjoys going to see the lights at Gotemba Kogen Tokinosumika.

Guide
Manufacturing Group,
Business Promotion Dept.
Tsubasa Fujimagari
Joined the company in 2014, currently in charge of the manufacturing department. Born and raised in Oyama Town, his favorite place to visit since early childhood is Fuji International Speedway. His recommended local dish is soba from Fujimagari-ya.