Best: First Things (stylised as Best ~first things~) is the debut greatest hits album by Japanese singer Koda Kumi.

The second disc contains four new singles: "Butterfly", "Flower", "Promise", and "Star", as well as a bonus track, the solo version of "The Meaning of Peace".

Before embarking on her 2005 First Things concert tour in Japan, Koda hosted a special event at Shibuya Station in which fans recreated the dress she wore on the album's cover.

[2] She said in an interview at the time of the release that she wanted people to enjoy listening to her old songs and to know the old Kumi Koda as well.

[2] Looking back on her activities, Koda stated that this greatest hits album is not a milestone, but that the timing of its release was right.

The DVD version included music videos for all of the album's songs except "No Tricks," "1000 no Kotoba," "Flower," and "Star.

[3] Rhythm Zone later distributed the album across Asia, including China, South Korea, and Taiwan.

[4] On the eve of the release of the best collection, a huge poster with Koda's cleavage exposed was displayed in front of the glass curtain wall of the Q-FRONT building in Tokyo's Shibuya Station.

[5] On September 21, 2005, Koda held a cosplay event at Shibuya Station to promote the album, with fans replicating the dress she wore on the cover; winners received either a signed copy of the album or Kumi's debut concert DVD, Secret First Class Limited Live (2005).

The single's physical and digital editions include the B-sides "Your Sunshine" and "Taisetsu na kimi e," as well as instrumental versions and a music video for "Butterfly".