Record the "Moving World" with 4D Gaussian Splatting. "Spatial Video Distribution Platform 4DGS.jp" Realized with Smartphone x 4DGS

Our company endorses April Dream, which aims to make April 1st a day for announcing dreams. This press release is a dream of "IZUTSUYA Inc."

IZUTSUYA Inc. (Headquarters: Chuo-ku, Tokyo) will develop a next-generation spatial video ecosystem centered on the 4D Gaussian Splatting (4DGS) distribution platform "4DGS.jp" to realize "a world where anyone can shoot, share, and experience spatial video with just one smartphone."

What is 4D Gaussian Splatting? The next evolution of video is "spatial."

We have experienced the evolution of video from photos to videos, from SD to HD, and then to 4K and 8K. However, no matter how much the resolution increases, traditional video has a fundamental limitation: "you can only see it from the angle chosen by the photographer."

4D Gaussian Splatting (4DGS) fundamentally overturns this limitation. By adding a "time axis" to 3DGS (3D Gaussian Splatting), it records an entire moving world, enabling "spatial video" that viewers can experience by freely changing their viewpoint.

IZUTSUYA aims to make this technology accessible not just to experts and creators. "Anyone can become a spatial video creator with just one smartphone" – that's the future we are seriously pursuing.

"Smartphone x Tens of Seconds x Infinite Viewpoints" realized by 4D Gaussian Splatting

① Just "shoot" with a mobile app

No special camera or multiple setups are required. Just use your smartphone to shoot a moving subject by circling 360°. Everyday scenes, children playing, pets looking friendly – any "moving moment" can become material for spatial video.

② "Spatial video" completed in tens of seconds

The captured video is automatically converted into 4DGS data on the cloud. Processing that used to take several hours or even days with traditional 4D modeling is completed in just tens of seconds. Photorealistic spatial video, reproducing even the sway of hair, the flutter of clothes, and ripples in water, emerges. One generation supports up to 1 hour of data generation.

③ The "viewing" experience changes – an immersive video experience with free viewpoints

The completed 4DGS data allows viewers to experience it by freely moving their viewpoint. In addition to playback, pause, and frame-by-frame advance, you can freely rotate to the desired angle and enjoy the video "as if you were there."

④ Anyone can post, anyone can view – "4DGS.jp," an open platform for spatial video

The created spatial video can be posted by anyone on the distribution platform "4DGS.jp." And anyone around the world can view that spatial video. Just as video democratization once occurred, now it's time for "spatial video democratization" – that is our dream.

Anticipated Use Cases for 4D Gaussian Splatting (4DGS)

Beyond the realization of this platform, its applications will expand into various fields.

Entertainment/Live: Relive concerts and sports events from any viewpoint later. Bullet-time-like effects are also freely possible.

Education/Research: Record and share experiments, classroom scenes, and fieldwork as spatial video.

Cultural Heritage/Art: Digitally archive the production process of traditional performing arts and crafts as "moving spaces."

Real Estate/Tourism: Virtual tours that convey the "atmosphere of the place" for property viewings and tourist destinations.

Daily Records: Preserve family memories and pet growth records "spatially." The future of photo albums.

The Future of Video Created by 4D Gaussian Splatting

What we aim for is a world where the experience of "watching video" fundamentally changes.

In the past, the emergence of video sharing platforms pioneered "an era where anyone can broadcast video." 4DGS.jp, utilizing 4D Gaussian Splatting, will create the next stage – "an era where anyone can broadcast spatial video." From video experiences confined to flat 2D screens to interactive spatial experiences. That is the future of video envisioned by IZUTSUYA.

Below are other initiatives by IZUTSUYA Inc. for 4D Gaussian Splatting (4DGS), including a free viewer.

4DGS Dedicated Viewer (Free):https://4dgs.jp/

4DGS Tools Suite Beta:https://izutsuya.io/2026/01/03/4dgs-tools-suite/