- New Bridge Project
- Bridge Maintenance Project
- Construction Business
- Special Construction Business
- Foreign Operation
- All
- Bent construction method
- Slide method
- Lift up method
- Push up method
- Special construction method (other)
- Railway construction/Station buildings/Pedestrian decks
- Medium/Skyscraper
- General architecture
- Plant construction
- Steel tower construction
- Seismic isolation retrofit/Renovation work
- Demolition work
- PC construction

Construction business | Steel tower construction
Demolition of Chuden Chiyoda Building radio wave absorber

Construction business | Steel tower construction
Demolition of Chuden Chiyoda Building radio wave absorber
| Orderer (Original order) | Kashima construction |
|---|---|
| Construction site | Aichi |
| Construction scale | 108 panels disassembled |
| Construction overview | The radio wave absorber on the steel tower on top of the Chiyoda Building was dismantled. |
| Construction year | 2012 |

Construction business | Steel tower construction
Hitachi New Elevator Research Tower

Construction business | Steel tower construction
Hitachi New Elevator Research Tower
| Orderer (Original order) | Shimizu Construction |
|---|---|
| Construction site | Ibaraki |
| Construction scale | 214m |
| Construction overview | research tower |
| Construction year | 2008 |

Construction business | Steel tower construction
Chuden Building wireless tower reconstruction

Construction business | Steel tower construction
Chuden Building wireless tower reconstruction
| Orderer (Original order) | Kashima construction |
|---|---|
| Construction site | Aichi |
| Construction scale | 94m |
| Construction overview | Steel tower |
| Construction year | 2006 |
Construction business | Steel tower construction
weather radar tower
Construction business | Steel tower construction
weather radar tower
| Orderer (Original order) | Rinkai Nissan Construction |
|---|---|
| Construction site | Chiba |
| Construction scale | 91m |
| Construction overview | Steel tower |
| Construction year | 2005 |

Construction business | Steel tower construction
Seto Broadcasting Tower

Construction business | Steel tower construction
Seto Broadcasting Tower
| Orderer (Original order) | Obayashi Corporation |
|---|---|
| Construction site | Aichi |
| Construction scale | 245m |
| Construction overview | Steel tower |
| Construction year | 2002 |
Construction business | Steel tower construction
Minamitorishima Loran Steel Tower
Construction business | Steel tower construction
Minamitorishima Loran Steel Tower
| Orderer (Original order) | dcc |
|---|---|
| Construction site | Tokyo |
| Construction scale | 214m |
| Construction overview | Steel tower |
| Construction year | 2000 |