"the guys at the front probably saw Tokyo Tower and were never at risk of actually hitting it........it's over 300 metres tall!"
At night time, and with hundreds of thousands of other lights in the Tokyo area, chances are it was Good Luck and not good management that they didn't hit it, because I very much doubt that they would have seen it.
This approach is not entirely dis-similar to the old IGS approach into Kai Tak, Hong Kong, inasmuch as the final approach course is at an acutely oblique angle to the runway, and even in daytime occasionally causes some problems - usually high descent rates, or overshooting the centreline.