"Saikō no Kataomoi" (最高の片想い, The Greatest Unrequited feelings) is Sachi Tainaka's third single and was released on August 30, 2006.

The title track was used as the ending theme for the Japanese animation Saiunkoku Monogatari.

The single reached #50 in Japan.

[1] The CD's catalog number is GNCX-0005.

This 2000s Japanese single–related article is a stub.