Nankai Railway operated between Namba Station and Wakayama City Station, and Tobu Railway operated between Kitasenju Station and Kuki Station, and both were considered for the buyout at one time, but as there were Kansai Railway in Wakayama district and the lines operated by Nippon Railway in Northern Kanto district which were both the buyout candidates, they were excluded from the buyout due to budgetary constraints.
当時、南海電気鉄道は難波駅-和歌山市駅間、東武鉄道は北千住駅-久喜駅間の営業を行っていたが、和歌山方面には買収対象である関西鉄道の路線、関東北部へは同じく日本鉄道の路線があったため、国有化の対象に一時は含まれたことがあったものの、最終的には予算問題もあって外された。