Well, I guess there is a slight chance this is an April's Fools joke but probably not.... deadgrandma already found it on cdjapan.
http://www.cdjapan.co.jp/detailview.html?KEY=TOCT-40420
いろはにほへと / 孤独のあかつき/ 椎名林檎
Release Date 2013/05/27
1. いろはにほへと / Irohanihoheto
2. 孤独のあかつき / Kodoku no Akatsuki
Ringo’s upcoming single is a double A-side which have both received tie-ups. “Irohanihoheto” will be used as the theme song for Matsushita Nao’s upcoming drama, ‘Kamo, Kyoto e Iku. ~Shinise Ryokan no Okami Nikki~‘, starting on April 9th. The song was both written and composed by Ringo herself.
Meanwhile, “Kodoku no Akatsuki” was written as the theme song for NHK E-tele’s new program, ‘SWITCH Interview Tatsujintachi‘, starting on April 6th. Ringo, who received the offer to provide the program’s theme song, had Watabe Aya, the scriptwriter for drama ‘Carnation‘, write the lyrics. For this song, Ringo was in charge of the composition and arrangement.
Source.