"Futarigoto" (ふたりごと, "Things About Us") is a song by Japanese rock band Radwimps, released on May 17, 2006, as the first of three singles from the band's fourth album, Radwimps 4: Okazu no Gohan.

The song was first certified gold by the Recording Industry Association of Japan as a full-length cellphone download a year and a seven months after its release, followed by a platinum certification a year and four months later. As of May 2011, it is the only Radwimps song to receive a platinum certification.

The song is simply arranged with a band arrangement, however increases with complexity over time. Later in the song, vocal distortion is introduced, instruments are played more frantically, with drum and bass sounds increasing during the final stages of the song. The song ends with an instrumental outro, featuring distorted guitar sounds. Two versions of the song exist, the single version as well as the "(Issho ni Ichido no Warp Ver." (一生に一度のワープ Ver., (Isshō ni Ichido no Wāpu Bājon, "Once in a Lifetime Warp Version") found on Radwimps 4: Okazu no Gohan.

The lyrics of the song begin with the song's protagonist wondering if he should express his feelings to a girl. He describes how unique the girl is, such as that her beauty is "the greatest genetic change of this century." The pair begin to date, and the protagonist begins to think about the relationship. At first, he states how he cannot believe in miracles, but feels that him meeting his lover makes him want to believe in miracles. He feels that their relationship is beautiful and wonderful, because his lover calls it a miracle.

At one point in the song, the protagonist wants to write kimi (君, "you"), but instead of reading it kimi, reading it as the word koi (恋, "love"), as well as writing boku (僕, "me") and reading it as the word ai (愛, "love"). He feels like nothing could separate them if they do this. At another point, the song references the Japanese divination style Rokusei Senjutsu. The protagonist's lover insists that the protagonist's destiny star is Jupiter, and that hers is Mars, and that he is at the daisatsukai (大殺界, "great killing world") (misfortune time) at the end of his six-year cycle. The protagonist says that he's actually an earth person (instead of a person with destiny linked to a planet), but no matter if that's true, or if his destiny star is Jupiter, it's only one planet away from Mars.

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