Kojima Seisakusho Co., Ltd.

Actively Hiring

Manufacturer Nagoya Headquarters, Asia, Japan 55 employees Since 1919 Revenue 1,700 Million

About the Company

【What is Kojima Seisakusho Co., Ltd.?】 Kojima Seisakusho Co., Ltd. is a manufacturer that develops and produces drainage equipment for buildings (such as drainage pipes and fixtures). In buildings like houses, apartments, hospitals, schools, and public facilities, systems are essential to safely drain water from toilets, kitchens, and washrooms. Kojima Seisakusho supports a comfortable water environment by developing and manufacturing equipment such as drainage joints and systems. While drainage equipment is usually hidden from view, it is a vital part of the infrastructure that ensures the safety and hygiene of every building. 📍 Location Headquarters: Nagoya City, Aichi Prefecture ■ Mission "Making people's lives more comfortable through reliable water and air technologies." Drainage equipment may not be flashy, but it is a crucial technology that protects the safety and hygiene of our buildings. Through our research and development of drainage technology, we continue to create products that support everyone's daily lives.

Open Positions 2

【Sales Position · N3】Expanding into the Taiwan Market | Global Business Development (Taiwanese Speakers)

2026, 2027 Grads New Graduate Jobs Business Full-time ¥220,950 ~

【STEM Only · N3】 Design Position | Product Design & Development for Taiwan Market (Taiwanese Speakers)

2026, 2027 Grads New Graduate Jobs Business Full-time ¥203,950 ~

For Those Considering Joining Us

🌏 To International Students
While our business has primarily focused on the Japanese market until now, our next strategic growth phase involves a full-scale entry into the Taiwan market.

To accurately capture local needs and drive this expansion forward, we are looking for individuals who can leverage their Japanese and Taiwanese language skills, along with their cross-cultural understanding.

"I want to build a career using my language skills."
"I want to work in Japan for the long term."
"I want to be a bridge between Japan and Taiwan."

We are sincerely looking forward to growing together with people who share these aspirations. We look forward to your application!

Key Figures

Year of Establishment

1919

Current # of Employees

Revenue (Million Yen)

1,700

Key stats

Average Age of Employees

Women v Men ratio

Male 37 : Female 18

Japanese v Non-Japanese Ratio

# of Fresh-Grad Hired in Past 3 Years

Domestic v International Sales Ratio

Locations

Location details are not available yet

A Google Map will appear here when an office address is available.

Office Pictures 4

Nagoya Headquarters

About Our Business

CORE Single-Tube Drainage System

CORE is the core drainage system line for building facilities. It provides durable performance, ease of installation, and broad applicability from mid-rise to high-rise buildings. It emphasizes quiet operation and energy efficiency, enabling long-term reliability and easy maintenance across different building types.

MoenaIn Fire-Retardant Joint

MoenaIn is a joint with built-in fire-retardant material that blocks the pipe to prevent fire and smoke from entering upper floors during a fire. It supports compact on-site installation, offers cover options for vibration-damping, and improves seismic performance and sound insulation in high-rise drainage systems.

Vinyl-Core Drainage System

Vinyl-Core provides a resin-based single-tube drainage solution with superior noise reduction, impact resistance, and corrosion resistance. It combines multiple vertical and branch pipe configurations to optimize drainage performance and quiet operation. It carries government approvals including ministerial certification and fire ratings.

Air-Lock Leak Kit (MANKŪ KIT)

The MANKŪ KIT is a drainage system leakage inspection tool that uses air pressure to detect leaks without using water. It shortens testing time and reduces water usage, lowering environmental impact. It connects easily via adapters and supports efficient testing on site.

Drainage Pipe Replacement, Renovation, and Maintenance

Comprehensive support for the replacement, renovation, and maintenance of existing drainage pipes. Includes slimline vertical pipe updates, egg-shell cleaning port installations, and other solutions to improve installation efficiency and longevity.

Perks / Benefits

global business and opportunities

sustainability business