The Cat Returns 猫の恩返し (Neko no Ongaeshi)

Alternative Name: 猫的报恩 (Māo De Bào Ēn)

Genre: Adventure, Comedy, Fantasy, Alternative Version, Catgirl, 

               Transformation

Description: 

Haru-chan, a normal girl in a normal town, saves a strange cat carrying a present from being overrun by a truck. In return she's going to receive lots of favors, including marriage to the crown prince of Cat Kingdom. As she finds that a bit too much, she gets into contact with the Cat Business Office. Together with CBO's owner, the Baron, she enters the Cat Kingdom to try and prevent her marriage.

Original Run: July 20, 2002

Studio: Studio Ghibli

Cat Planet Cuties あそびにいくヨ! (Asobi ni Iku yo!)

Alternative Name: 玩伴貓耳娘 (Wán Bàn Māo Ěr Niáng)

Genre: Comedy, Romance, Sci-Fi, Aliens, Catgirl/Catboy, Fanservice, 

               Harem

Description: 

Nice guy Kio’s normal life gets turned upside down when he meets a friendly, sexy cat-alien named Eris. She’s on a peaceful mission—and she’s ready to play. Things get even friskier when her fellow felines set up base in Kio’s house. It’s not all fun and games, though. Danger is afoot, thanks to several secret agencies and enemy dog-aliens on Eris’s tail.

Episode: 12 + 1 OVA + 1 Special

Original Run
Series:July 10, 2010 – September 25, 2010
OVA: June 15, 2011

Special: June 15, 2011

Studio: AIC PLUS+

Nekogami Yaoyorozu 猫神やおよろず

Alternative Name: 众神中的猫神 (Zhòng Shén Zhōng De Māo Shén)

Genre: Comedy, Supernatural, Gods/Goddesses/Deities, Catgirl/Catboy, 

               Slice of Life, Fantasy

Description: 

Koyama Yuzu is running an antique shop. Mayu, a cat god (nekogami), is living off Yuzu and leads an idle life playing games. Lots of other gods visit Mayu and enjoy merrymaking.

Episode: 12 + 1 OVA + 7 Specials

Original Run
Series: July 9, 2011 – September 24, 2011
OVA: March 21, 2012
Special: September 21, 2011 – March 21, 2012

Studio: AIC PLUS+

K Project

Genre: Action, Supernatural, Drama, Comedy, Magic, Mystery, 
               Sci-Fi, Amnesia, Bishounen, Catgirl/Catboy, Superpowers, 

               Tragedy, Fanservice, School, War, Technology

Description: 

Yashiro Isana has lived a relatively ordinary, simple life. He lives in the technology-advanced Shizume City and attends Ashinaka High School, a notable high school that is located on an island just outside the areas. Yashiro is friendly with everyone. Nothing ever seems wrong about him, except perhaps his habit of forgetting where his school-issued PDA is.

However, nothing normal has been happening since the recent murder of Tatara Totsuka, prominent member of the infamous HOMRA. No one knows who exactly killed him but the man responsible bears an uncanny, identical appearance to Yashiro. Seeking vengeance, the Red Clansmen of HOMRA set out to get Yashiro and kill him.

Everyone suspects that Yashiro is the murderer. But whether the guilt is his is not clear.

Episode 
Season 1: 13 Episodes + 1 Movie 
Season 2: 13 Episodes + 6 Movies

Original Run
Season 1: October 4, 2012 – December 27, 2012
Movie: July 12, 2014
Season 2: October 3, 2015 – December 26, 2015
Movie: July 7, 2018
Movie: August 8, 2018
Movie: September 1, 2018
Movie: October 6, 2018
Movie: November 3, 2018
Movie: December 1, 2018

Studio: GoHands

Loveless ラブレス (Raburesu)

Alternative Name: 无爱之战 (Wú Ài Zhī Zhàn)

Genre: Adventure, Drama, Magic, Mystery, Romance, Catgirl/Catboy, 

               Shounen-Ai/Yaoi, Fantasy, Action, Supernatural

Description: 

Twelve-year old Aoyagi Ritsuka is left with his insane mother as his only family when his brother, Seimei, is killed suddenly. After moving to a new school, he meets Agatsuma Soubi, who claims to have known his brother. Ritsuka eventually discovers that Soubi and Seimei used to be a fighting pair, whereby Soubi was the "Fighter" and Seimei was the "Sacrifice". Now that Seimei is gone, Ritsuka has inherited Soubi, who will become his "Fighter". After learning that Seimei was killed by an organisation known as the "Seven Moons", Ritsuka decides to investigate into his brother's death, with the sometimes useless help of Soubi, along the way.

Episode: 12 + 6 Special

Original Run
Series: April 7, 2005 – June 30, 2005
Special: November 1, 2005 – April 27, 2006

Studio: J.C. Staff