InuYasha The Final Act

is the second InuYasha anime series which covers the last 21 volumes of the manga (published since the end of the first series), with the original staff and cast and in terms of plot picks up where the previous series left off. Viz has confirmed an English adaption at its panel at comic-con. It began to air on October 3, 2009 and ran weekly on Vizanime.com with subtitles.

Opening Theme

 * Kimi ga Inai Mirai (君がいない未来) by Do as Infinity

Ending Themes

 * With You by AAA
 * Diamond by Alan
 * Tōi Michi no saki De (遠い道の先で) by Takekawa Ai (武川アイ)

Episodes

 * 1) Naraku's Heart (奈落の心臓, Naraku no Shinzou)
 * 2) Kagura's Wind (神楽の風, Kagura no Kaze)
 * 3) Meido Zangetsuha (冥道残月破, Meidou Zangetsuha)
 * 4) Dragon-Scaled Tetsaiga (竜鱗の鉄砕牙, Ryuurin no Tetsusaiga)
 * 5) The Great Holy Demon Spirit’s Test (妖霊大聖の試練, Youreitaisei no Shiren)
 * 6) The End of Moryomaru (魍魎丸の最期, Moryomaru no Saigo)
 * 7) Mausoleum of Mount Azusa (梓山の霊廟，Azusayama no Reibyou)
 * 8) Among the Twinkling Stars (星々きらめきの間に, Hoshi-boshi Kirameki Aitani)
 * 9) Sesshomaru in the Underworld (冥界の殺生丸, Meikai no Sesshoumaru)
 * 10) Flowers Drenched in Sadness (悲しみに濡れる花, Kanashimi ni Nureru Hana)
 * 11) Kanna's Gravestone (神無の墓標, Kanna no Bohyo)
 * 12) Sango's Feelings, Miroku's Resolve (珊瑚の想い 弥勒の覚悟, Sango no Omoi Miroku no Kakugo)
 * 13) A Complete Meido (完全な冥道, Kanzen na Meidou)
 * 14) In Pursuit of Naraku (奈落の追撃, Naraku no Tsuigeki)
 * 15) True Heir (正統なる継承者, Seitonaru Keishousha)
 * 16) Hitomiko's Barrier (瞳子の結界, Hitomiko no Kekkai)
 * 17) Magatsuhi's Evil Will (曲霊の邪念, Magatsuhi no Janen)
 * 18) The Day of Days (人生の一大事, Jinsei no Ichidaiji)
 * 19) Kohaku's Shard (琥珀の欠片, Kohaku no Kakera)
 * 20) When the Jewel is Whole (四魂の玉が完成する時, Shikon no Tama ga Kanseisuru Toki)
 * 21) Inside Naraku (奈落の体内へ, Naraku no Tainai e)
 * 22) Naraku: Trap of Darkness (奈落 闇の罠, Naraku Yami no Wana)
 * 23) Naraku: Trap of Light (奈落 光の罠, Naraku Hikari no Wana)
 * 24) Naraku's Uncertain Wish (奈落 儚き望み, Naraku Hakanaiki Nozomi)
 * 25) Thoughts Fall Short (届かぬ想い, Todokanu Omoi)
 * 26) Toward Tomorrow (明日へ, Ashita he)

Source
Anime News Network 07-16

Anime News Network 07-24

Anime News Network 09-14

InuYasha: The Final Act List of Episodes