However, in addition to the huge cost burden of boring the Ikoma Tunnel under Mt. Ikoma, when the rainy season began, the service was reduced due to insufficient operating revenue because of a decline of tourists as well as a small population along the line, and people made fun of the railway company, calling it 'Osaka Tenki Kido' (Osaka Weather Tramway) instead of 'Osaka Denki Kido' (Osaka Electric Tramway).
しかしその生駒山を貫く生駒トンネルの莫大な開削費用負担や、沿線人口が少なく観光客頼みであった輸送が雨天期になって減少したことで、大軌は「大阪天気軌道」と揶揄された。