Job and Internship Information


The more you know Iizuka, the more interesting it is!

Iizuka started out as repair plant for oil refinery pumps and valves. This year marks the 69th anniversary of the company’s foundation.
Today, the company has expanded its field of activities into many fields and manufactures parts that are indispensable for daily life.
As a new challenge, advanced laser processing and bending machines have been introduced, and the delicate programming skills of women are expanding the scope of their activities.
Why not enter our company, which continues to challenge itself based on the company motto of ”Enthusiasm”, Challenge, and Service?


Working environment

A corporate culture that is never satisfied with the status quo and is always up for a challenge.
We are a company that creates a culture, a spirit of service, and boldly takes on the challenge of new technologies.

01Establishment of the company

Establishment of the company

02Number of bases

Number of bases
5 domestic bases


129 employees

04Gender ration

Gender ration


Average age 41 years old

06Average years of service

Average years of service
9 years on average

07Monthly average overtime hours

Monthly average overtime hours
11 hours(Varies depending on department and season)

08Number of days off per year

Number of days off per year
110 days

09Average number of days off per year

Average number of days off per year
11.5 days

*As of April 1, 2022

Creating a work environment where both men and women can work comfortably

Iizuka strive to creating a work environment where both men and women can work comfortably and balance work and family life.
We also provide maternity leave before and after childbirth, maternity leave, and support for returning to work to ensure a safe pregnancy and childbirth, and we support not only women but also men in raising children so that parent can raise their children together and fulfill their private time.

In-house job training ①

In house job training system

Afetr joining the company, new employees receive training in the basic concepts of manufacturing and quality standards, as well as basic training for their new assignment.

Through on-the-job training, we provide daily guidance so that traiunees can gain basic knowledge to engage in manufacturiing, and back them up so that they can reach the standards of the in-house qualification system.

We also provide full support for the acquisition of necessary outside expertise in order to further improve the level of our services as the years go by.

We face to our products on a daily basis as a unit for to develop manufacturing experts.

New employee Training
On the Job Training
Promotion of qualification acquisition
Qualification acquisition results Successful candidate
1st grade Certified Skilled Professional of Machining (Numerically controlled lathe) 2 person
2st grade Certified Skilled Professional of Machining (Numerically controlled lathe) 6 person
1st grade Certified Skilled Professional of Machining (Machining center) 2 person
2st grade Certified Skilled Professional of Machining (Machining center) 3 person
2st grade Certified Skilled Professional of Machining (Machine inspection work) 2 person
Non-Destructive Testing Personnel Certification (Penetrant Testing Level 2) 1 person
Non-Destructive Testing Personnel Certification (Penetrant Testing Level 1) 3 person
Vocational training instructors 2 person
Stainless steel welding skill person (TN-V) 2 person
In-house job training ②

Hands-on lab where you can learn about our products

「Want to know how the products I process are actually used」
In response to the exploration of these employees, a training room was created in 2019.

Our philosophy is to engage in manufacturing with an understanding of “products” and ”technology”, and in the training room, students are able to ”assemble and disassemble” actual products. In the training room, students can learn about the true meaning of products, such as why this type of processing is necessasry and why the accuracy of this surface is important.

We also invite ouside lectureswho have actally been involved in the manufacture of our products to give lectures on the difficuluties encoutered during development.


Representative director Message

Would you like to make medical equipment parts?
Would you like to make fluid equipment parts for chemical plants?
Would you like to make semiconductor parts that are indispensable to people’s lives?

Our metal working technology has received commendations from the national and prefectural governments, and our high level of metal manufacturing technology has generated great trust and stable growth in our high level of metal manufacturing technology has generated great trust and stable growth in our business. the joy of completing products that they have drawn and that are useful throughout the world is a rewarding experience for our employees. With a spirit of challenge and without fear of failure, we are always striving to raise the level of our company. Let’s work together for a bright society for the next generation.

Representative director
Hajime Iizuka

Learn about the work of seniors

At Iizuka, our employees are proud and passionate about their work, and their work, and they work with vigor and enthusiasm.

01Yuki Kobayashi / Karuigwa plant manufacturing group 2

Mid-career hire June 2019
What do you usually do?
Operates multi-tasking machine to process medical devices.
Robot operation allows us to machine at night.
Other main duties include tool change, inspection, and maintenance.
What do you find most rewarding about your job?
I feel a sense of satisfaction and accomplishment when I learn a new process or become able to do machine that I could not too before.
Since we are making products that can affect people’s lives, I work with sense of urgency, and it is rewarding to think that the products I have made are helping people.
What do you find attractive about the company since you joined?
We have an environment where we are allowed to take on any challenge regardless of age or experience, and we can work under the guidance of our technically skilled seniors, so we can feel that we can grow as much as we work hard.
We also have products of strict precision, and the environment is attractive because it allows us to learn every day. It is a good place for women to work, and they can do the same machining work as men.
What are your goals for the future?
There are still many things I don’t know and can’t do, and I have a lot to learn.
I would like to acquire machining knowledge and skills little by little, and continue to take on new challenges.
Yuki Kobayashi/Karuigwa plant manufacturing group 2
Yuki Kobayashi/Karuigwa plant manufacturing group 2

Daily flow

Going to work
Cleaning around machines, pre-start inspection, dimension check
Morning meeting
Tool change and dimensioning, new employee training
Dimensioning, new employee training
Orientation inspection for robot machining at night, training for new employees
100% inspection
100% inspection
Tool change and dimensioning of another machine
Preparation for robot operation
Dimension check, workpiece loading, robot operation
Leaving office

02Senei Sunazuka / Manager, Quality assurance department

Joined the company in March 2015
What do you usually do ?
In the quality control department, for which I am responsible, I am in charge of finishing, inspection, shipping and packaging, and quality control. Finishing includes deburring and cleaning, while inspection includes dimensional measurement, gauge check, and appearance check,
In quality control, dimensional data is graphed and feedback to the machining department, and advice for improvement is simultaneously sent out to subcontractors in addition to pointing out defects in order to reduce defects.
As a manager, I consider my role to be to implement the PDCA cycle to improve quality. Specifically, I try to create an environment in which the members of the department can work efficiently by considering the causes of defects based on defect data, working on countermeasures, and creating system through discussions with machining and production control departments.
What do you find most rewarding abour your job?
This is where we fell, we are contributing to society. The Karuigawa plant manufactures pump parts mainly for dialysis machines. I am proud that our products are used to protect the lives of people suffering from illnesses. If we inadvertently shipped a defective product ad it had a faulty seal, for example, in the worst-case scenario, the patient’s blood could leak out. This should never happen.
We will continue to make further improvements, realizing that preventing the outflow of defects through quality control is beneficial not only to the company and its suppliers, but also to society.
Senei Sunazuka / Manager, Quality assurance department
What do you find attractive about the company since you joined?
I used to be a sale in food industry, and I simply find it interesting to see how a lump of metal is processed by a machine, polished to shine, and turned into a product.
The Karuigawa plant excels in 24 hours operation with robots and in the machining of complex screw shapes using 5-axis milling machines, a technology that no other company can imitate.
In addition, we have a culture in which young workers actively take on challenges, and they bring us things like, “We have tried to improve our machining, so please inspect it for us. Even if they are busy with other work, they feel like,” okay I’ll have taken a look at it for you. The good atmosphere is another attraction of the company.
What are your goals for the future?
Employees who knew the Yasuda plant when it was built (about 20 years ago) say, it’s hard to imagine what it looked like back then. I have only been with the company for six and a half years, but even in that short time. The company organization has grown rapidly.
To make the next 20 years an unimaginably great leap forward from now, I want to improve quality, meet deadlines, and become an even more trusted presence for our customers.
Finally, to the new workers and mid-career hires who will become my future colleagues.
I mentioned earlier that I was previously a salesman in the food industry, but in fact, when I joined the company,
I was stating form completely blank slate whom it come to metal machining… Even so, thanks to the guidance of my(younger) boss and the careful instruction of my (younger) seniors, I gradually deepened my understanding and now I am entrusted with work as a support of them.
Please do not give up because you have no experience, but take the first step Ans say, “Let’s try it first”.
We look forward to meeting with you and your colleagues who can take on new challenges together.
Senei Sunazuka / Manager, Quality assurance department

Daily flow

Pre-work inspection, morning meeting
Approval of inspection forms, preparation & approval of various applications, return e-mails, etc.
Responding you internal and external inquiries in parallel with inspection work
Responding you internal and external inquiries in parallel with inspection work (continued)
Regular web conferencing with overseas subcontractors
Handling new projects, preparing various reports, etc
Nondestructive testing
Preparation inspection forms, handling of objective products, preparation of feedback materials for subcontractors, checking e-mails, filing of various documents, etc.
Leaving office

2025 New Graduate Recruitment Information

Individual company information session reservation is now being accepted.
Job descriptions and factory tours are scheduled.

Recruited information is posted on the “Niigata Shushoku open Navi” website.
Please register as a member before entering the site.

Check the employment opportunities

Internship information

Iizuka offers hands-on experience in state-of-the-art 6-axis machining

Check out our company description video

machining Internship

Time Contents
10:00~12:00 Company presentation and factory Tour
12:00~12:50 Lunch (with senior employees)
12:50~16:00 On site training
(Training in each department)
16:00~ Looking back

12:50~16:00 “On-site practice” will be conducted by interviewing students, and the curriculum will be designed according you the fields you are studying and what you want to know. The student will be divided into “machining”, “Production technology”, “Quality Control”, “Production management”, “Accounting”, and “General affairs” for the practical training.

【Example of on-site training in machining】
  • Equipment and product description
  • Installation and removal of products
  • Product measurement
  • Program content can be customized

※Practice hours for production control, accounting and general affairs are from 12:50 to 15:00.
※You do not need to have work clothes and work shoes.
※Lunch will be provided by our company

Program content can be customized.
Scheduled to be held on the 15th of each month. If it is a holiday, it will be set for another day.
In you are interested, please feel free to contact us.

Inquiry about Internship

ADDRESS 3-15-16, Handa, Kashiwazaki-City, Niigata 945-0812 Japan
TEL +81 (0)257 23 5611
(reception time 8:00 to 17:00)
STAFF Iizuka, Takahashi, General affairs dept.
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