Additionally, a book asserts that the letter 'K' in 'K-Limited Express Orihime,' which directly connects it with the Katano Line, symbolizes either 'Katanoshi Station' or 'Kisaichi Station'; this is because 'K-Limited Express Orihime' isn't the through train between 'Kei' (Kyoto) and 'Han' (Osaka).
又交野線直通K特急「おりひめ」の「K」は「交野市・私市」の頭文字の「K」と解釈している書籍も存在する（これは京阪間直通ではないため）。