I'm remembering it was my first bike that fell apart from lack of care and the Sekine was on loan from a family member, so I took care of it but it still was a low quality bike.
That doesn't mean it didn't work all right, but I did replace the wheels so they would stay in true much better than the old, steel ones I replaced did. I also bought a new Shimano 105 derailer and freewheel so it would shift better too.
I returned it 2 years later in better shape than it was in when I first borrowed it.