A limited edition of Savage Garden's second greatest hits album, "The Singles" was released in Japan on May 25th 2016 to promote the anime, featuring a picture of Josuke on the cover.
This is a song where the rhythmic pattern represents the 90's era in which Part 4 is set. There's a certain touch of the progressive songwriting in the way it dramatically crescendos through the song, and I thought it was perfect for the anime.
The ending animation begins with the Arrow slowly panning across the scene as dim lights slowly flash. With the final flash, the Arrow is replaced by Josuke's pointing hand as the scene continues panning upwards to his face. Josuke then smiles and turns before striking a pose with both of his hands above his head. The scenery changes as an outline of Josuke becomes the night sky, with a disco-light shaped heart in the middle. The scene slowly zooms into the heart, which fades away into the streets of Morioh.
The scenery continues down a cul-de-sac, with Jotaro, Ryohei and Tomoko Higashikata all standing around it. The scene then continues into the Morioh Train Station, with an advertisement billboard for the Cinderella Beauty Salon inside. A train passes by, transitioning into Morioh Town Square. The scenery continues down the street, leading past Yukako, Tamami and Toshikazu standing in front of Ghost Alley; along with the shadows of Reimi Sugimoto and Arnold. As the shot further continues down the road, Okuyasu and Keicho Nijimura stand outside the abandoned house they made into their home. The scene then moves past the famous Anjuro Rock and transitions to Josuke, wearing a necklace with two houses attached to it as the road winds and weaves into obscurity.
The scene then cuts quickly to close-up shots of Josuke singing along to the song before zooming into one of the house's windows. Inside the home is a panicked Koichi, along with his mother and his sister behind him suspended in the air, along with broken furniture and flowers. The scenery continues through the home and into a hallway, which is likely the school hallway where Shigechi meets his fate. This fades into a dark tunnel made up of shipping crates with multiple arrows inside. The scenery finally changes to feature a pier and lighthouse, with Joseph's yacht docked outside it. Zooming into the lighthouse's lamp reveals it to be a peace sign, leading into the scenery becoming filled with reflections of Josuke in a diamond, with the turtle he was forced to help in DU Episode 1 being seen in a facet near the bottom-right. The scene then pans out to reveal the diamond being in the center of a large, golden "J"; with a heart on the left and Killer Queen's skull on the right.
Altered Versions
Starting from DU Episode 14 onwards, during the hallway sequence a copy of Shonen Jump with Pink Dark Boy on the cover appears out of thin air. The manga opens up to reveal Rohan Kishibe illustrating some pages as the camera zooms in on his bookshelf, which contains past works from Hirohiko Araki such as Baoh: The Visitor and Cool Shock B.T.. For a split second, in a gap between some books Bug-Eaten can be seen hiding before the camera transitions down the hallway and into the shipping crates as normal. The scenery then changes to the pier and lighthouse, this time featuring Akira Otoishi playing his guitar and Joseph Joestar holding Shizuka Joestar in his arms.
Later on starting from DU Episode 18, Shigekiyo Yangu appears before Rohan and the Pink Dark Boy sequence in the school's hallway, foreshadowing his fate. From DU Episode 19, Reimi and Arnold are seen sitting on the Owson store before Okuyasu's and Keicho's sequence. At end of the song when Josuke appears in the diamond lighthouse's reflection, he disappears halfway through only to be replaced by Yoshikage Kira smiling in his trademark suit; additionally, the turtle seen in one facet is replaced by a rat. From DU Episode 30, Yoshihiro Kira inside Atom Heart Father can be seen flying through the tunnel, and the images of Yoshikage Kira and the rat in the diamond's facets are replaced with "Kosaku" and Stray Cat.
The symbols on the "J" emblem are icons that define several characters and themes in Part 4, including: Josuke's heart pin from his jacket, the hand from Jotaro's hat, a diamond and number "4" referencing the title, and the skull emblem featured on Yoshikage Kira's tie and Killer Queen's belt.
The second shirt Josuke wears as he sings with the song resembles Josefumi Kujo's shirt in Part 8.
As the scene goes down the school hallway towards the end, outside the windows large crop-circles are visible; a clear reference to Mikitaka Hazekura.
The band Savage Garden was previously used in the name of an arc along with a carrier pigeon in Part 6.
In a tweet, Darren Hayes, a member of Savage Garden was more than happy to license their song for the anime, admiring the JoJo series in general.