On 12 January, VOLTACTION announced that that all four members would receive their second 2D outfits, and would reveal them via a stream relay with 30 minutes allotted for each member. The relay was held in the same order as their debut streams with Akira going third, revealing his second outfit at 23:30 JST that evening.
On 13 January, VOLTACTION celebrated their half-anniversary since debut by releasing their second original song, "Watercolor". The song was written and produced by the band. During a celebration stream for their half-anniversary held on the same day, they also announced the release of their second voice drama, "undertake any request", which was released that evening.
On 8 February, announced that they would be featuring Akira in the magazine's March issue.
On 31 March, Akira reached 250,000 subscribers on his YouTube channel.
On 26 April, VOLTACTION announced a 3D model debut stream relay with Akira as the first person to have his 3D model debut on 5 May. His 3D debut stream peaked at over 68,000 concurrent viewers.
On 5 July, VOLTACTION announced that they would be celebrating their first anniversary since debut with a live 3D concert, "RAISE the VOLTAGE", which was streamed for free on the group's YouTube channel on 15 July. At the concert, they debuted their third original song, "RELOAD!!!!", which was written and produced by OSTER project. They also announced the release of the "Memories of Nostalgia" series of voice dramas over the course of the following months, each of which are set during VOLTACTION's formative years at Erfolg College and focuses on a different member and their respective backstories/lore; the first, "Seraph Dazzlegarden-hen", was released shortly after the concert.
On 13 July, VOLTACTION opened an official Instagram account.
On 23 July, magazine revealed that VOLTACTION would be featured in its 2359th issue as part of its NEXT Generation 2023 segment, which was released on 2 August.
On 14 August, a Room 4S-centric voice drama, "Around 4S ~Tsuioku no Kyūka~", was released.
On 14 October, Akira reached 300,000 subscribers on his YouTube channel during a 3D endurance stream he held with the goal of reaching the milestone.
On 23 October, VOLTACTION's second "Memories of Nostalgia" voice drama, "Shikinagi Akira-hen", was released.
On 1 November, announced that VOLTACTION would be interviewed and featured in the magazine's December issue.
From 4 November to 11 November, coinciding with the second anniversary of their VTA debuts, the 8 former members of VTA's first generation who ultimately debuted with NIJISANJI held the Ano 8-Nin Nayutan Medley (あの8人でナユタンメドレー), a cover relay in which each member sang a different NayutalieN song. Akira released a cover of "Andromeda Andromeda" (アンドロメダアンドロメダ) on 5 November as part of this relay. The relay concluded with a cover of "Alien Alien" (エイリアンエイリアン) by the full group on 12 November.
On 13 November, VOLTACTION's third "Memories of Nostalgia" voice drama, "Watarai Hibari-hen", was released.
On 30 November, NIJISANJI announced that Akira would receive a 3.0 Brushup to his 2D model. He showcased his updated model and its new facial expressions in a reveal stream on 1 December.
At NijiFes 2023, which was held from 23 December to 24 December, he was part of the cast of the Sakuyui Theater special stage on Day 1, and participated in the NIJISANJI Dance Live alongside the other members of VOLTACTION on Day 2.