


For the advance of underground utilization technology
~ JTA 50th Anniversary 1975-2025~
Update information
- Exhibition(WTC2025)
Tunnelling Activities in Japan2024.07.22 Tunnelling Activities in Japan2024.07.22 Tunnelling Activities in Japan 20182024.07.19 Tunnelling Activities in Japan 20202024.07.19 Tunnelling Activities in Japan 20222024.07.19 JTA-ym2024.07.17 Technology2024.07.17 Tunnels and Underground2024.06.27 Exhibition(WTC2024)2024.06.25 KFC2024.04.15 MAEDA KENSETSU2024.04.15 TODA2024.04.15 TAISEI2024.04.15