Judas Priest cover. Their sixth album Takasago Army was released on Spinefarm Records in 2011. This album is based on the story of the Takasago Volunteers, Taiwanese aboriginal soldiers who fought for Japan during World War II. The album included guest appearances from singers Yu Tien and Chan Yawen, and Taroko musician Pitero Wukah on pgaku flute. Main songwriters Freddy Lim and Jesse Liu stated that Takasago Army marked a reversal in the band's writing, as the songs were first written in a traditional Taiwanese folk format but were then played with heavy metal techniques. Doris Yeh stated that the Western definition of "heavy metal," whether it is black metal or death metal, cannot easily define Chthonic's style; thus, having to choose a term, the band uses the term "Orient Metal." Takasago Army reached No. 109 on Japan's Oricon music chart, and the video for the song "Takao" was nominated for the 2012 Golden Melody Award in Taiwan for best music video. The album was featured in the international metal magazines Revolver, Terrorizer, and Metal Hammer, and was named the year's best melodic black metal album by the critics' webzine Metal Storm. Furthermore, Boulevard Brutal, a French music critics' site, selected Takasago Army as the best black metal album of the year; and the Japanese rock magazine Burrn!! awarded the band a No. 7 rank for best album of the year and No. 23 for best heavy metal band. After more international touring in North America, Europe, and Asia, including stints with Arch Enemy, Devil Driver, and Skeletonwitch, in October 2011 Chthonic organized a concert at Taiwan's remote Sing Ling Temple, a historical landmark mentioned in their last three albums. This concert featured a guest appearance by singer Randy Blythe of Lamb of God, while selected fans from outside of Taiwan were given free plane tickets to travel to the concert. The competition for tickets was covered widely in Taiwanese media. In early 2012 Chthonic released a DVD of the Sing Ling Temple concert and also made some acoustic appearances at Eslite bookstores in Taiwan. In 2012 Chthonic supported Lamb of God in Asia, while ESP Guitars released customized models for bassist Doris Yeh and guitarist Jesse Liu. Chthonic continued to play major festivals in Europe and Asia, with former Megadeth guitarist Marty Friedman appearing with the band at Japan's Fuji Rock Festival. The band's seventh studio album, Bu-Tik, and