There is a typing error in the pricing conversion.
FTTH prices for new subscribers by an eye-watering 34 percent from ¥5,460 (US $66.70) to ¥3,600 ($34)
The 3,600 Yen is actually equivalent to $43.98, a difference of only $22.72. But still a very significant drop. Note also that this rate is only for NEW subscribers, so it is just a teaser to get users to sign up. Marketing costs, that is all the discount is.
Now if NTT-E & -W had municipal wireless, either Small Cell Wi-Fi and / or LTE-Advanced when available, on top of their FTTH, ... ummmm?