Initially, the design was an cut & cover method, but due to the local environment & many underground utilities, it was changed to High-density slurry type pipe jacking method. However, a large number of leftover earth retaining wall were discovered, & the milling mall method (insurance method) was adopted.
Since the area was close to the downtown area near the station, a soundproof house was installed & construction was done at night when crossing the track. In addition, since it was designated as a flammable gas generation danger area (B rank), a simple explosion-proof equipment was installed & constructed.
The construction was completed without hitting the leftover earth retaining wall.