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When the band recorded "Bagoodbye" (after the sessions that produced "Yūshinron"), they noted there was stylistically something good about it, and then considered it the focal stylistic point of the album. Vocalist and lyricist Yojiro Noda noted that while lyrics were the central point of RADWIMPS 3, the importance of the lyrics were more balanced with other aspects in RADWIMPS 4. However, the band did not start out with a particular concept to work around. This is in comparison to the band's first album, in which they had an image, but had not really considered what it was. įor the band's fourth album, the members consciously focused on the sound the band had. Work on RADWIMPS 3 was finalised in December 2005, but as the band still had many things they wanted to try, they immediately started work on their next album. "By My Side", the B-side on the " Setsuna Rensa" single was also a part of these sessions. "Futarigoto" was a song originally intended for RADWIMPS 3, however as the band could not work out how to complete the song properly, it was shelved. After the band's RADWIMPS Haruna Tour in September 2005, the band rush-recorded five songs, including the singles "Futarigoto" and "Yūshinron." These two songs took up an extreme amount of effort for the band.
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