The series originally consisted of 13 albums released on a monthly basis from January 2009 to January 2010. They were also recorded one a month, and Masami Akita frequently revisited older recordings. It was also part of his then-recent return to live drums. Jenny Akita's cover art depicts illustrated birds on top of photographs. Each CD is limited to 1,000 copies.
The series was also available by subscription; as just the CDs, or with a custom-made bamboo box. Also available only with purchase of the box was an acrylic-on-bamboo painting by Akita himself.
In March 2010, Important released Ecobag/13 Birds in a Bag +1, this set included the original 13 CDs, a bonus CDR of additional material from the sessions, and a piece of original xerox art made by Akita in the mid-90s. All packaged together in a tote bag and limited to 200 copies. After the Ecobag sold out, the label released the Ecoblock or Bird Block in April 2012, with just the original 13 albums and a T-shirt.
In 2009, Important announced that an LP named Jigokuhen would be released to celebrate the completion of the series. Originally scheduled for the first anniversary of the completion of the original series (January 2011), but it was delayed until March. The album is the 15th and final volume of the Japanese Birds series, but is a stand-alone release.
An unreleased work called "samidara1" was played during an event at ohrenhoch in Berlin, Merzbow described it as "using the method of several granular synthesis programs and random process of the composition.", and referenced Graft, Chabo, Jigokuhen, and Ouroboros as having the same concept.
This is the bonus CDR that was included exclusively with the Ecobag, only 200 copies were made. It is also considered to be the 14th album of the series. Subscribers of the original series were able to download it from the label for free.
The album title transliterates to Tengajū no tori or Birōdo no tori and means "velvet bird". The track titles translate to "first song" and "second song".
Jigokuhen is an album released to commemorate the first anniversary of the completion of the original series (January 2011), but it was delayed until March. It is the 15th and final volume of the Japanese Birds series, but is a stand-alone release.