Manhole Worker (Cement Product Manufacturing)
まんほーるこう（せめんとせいひんせいぞう）
Industry & Occupation
Classification
Summary
Occupation that manufactures concrete products for manholes. Mixes cement, aggregates, and water, molds in formwork, compacts with vibration or pressure, cures appropriately, and completes the products.
Description
Manhole Worker (Cement Product Manufacturing) is a specialist occupation that produces concrete products for manholes used in sewage and water supply systems. Handles a series of manufacturing processes including measuring and mixing raw materials, placing into formwork, vibration compaction, curing, demolding, and surface finishing. Manages product dimensions, strength, and other quality aspects, and also operates and maintains machinery, requiring skills and attention to detail. Primarily involves production line work in factories, including forklift transport and handling of heavy objects, so physical stamina and teamwork are important.
Future Outlook
Due to measures against aging of sewage and water supply facilities and infrastructure development needs, demand for manhole products is expected to remain stable. There is a trend toward labor-saving measures and automation of quality control.
Personality Traits
Cautious / Good teamwork / Physically fit / Strong sense of responsibility
Work Style
Heavy material handling / Indoor and outdoor work / Line work / Shift work
Career Path
Manufacturing Operator → Group Leader/Leader → Factory Manager → Quality Control Staff → Production Engineering Engineer
Required Skills
Cement and aggregate mixing adjustment / Concrete finishing / Formwork assembly and disassembly / Product curing management / Quality inspection (dimensions and strength) / Vibration compactor operation
Recommended Skills
Forklift operation / Machine maintenance / Safety and health management / Understanding of JIS A 5308
Aptitudes (Strengths Preferred)
| Item | Description |
|---|---|
| Attention to Detail & Accuracy | Errors in mixing ratios or curing times directly affect product quality. |
| Numerical & Quantitative Analysis | Need to accurately measure mixing ratios of cement and aggregates. |
| Physical Stamina & Endurance | Due to handling heavy objects and prolonged standing work. |
Aptitudes (Weaknesses Acceptable)
| Item | Description |
|---|---|
| Creativity & Ideation | Mainly routine work, so creativity is limited. |
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