AMS 2026

Two Year Sentence Handed Down to Yoshitomo Imura in Japanese 3D Printed Gun Case

RAPID

Share this Article

im3There is no doubt that with the help of technology the world is changing in many ways, providing solutions to many age old problems, while at the same time creating new problems in the process. Although 3D printing has been a godsend for so many areas, from medicine, to design, to even NASA’s research, 3D printed guns remain at the top of regulators’ concerns around the globe.

Back in May, we reported on the arrest of a 28-year-old employee of Shonan Institute of Technology in Japan, Yoshitomo Imura. The arrest came after authorities in Japan got wind of a YouTube Video in which Imura was seen test firing a Zig Zag revolver, which he had 3D printed. In fact, they found two different homemade 3D printed guns within Imura’s apartment, leading to the swift arrest.

 Yoshitomo Imura

Yoshitomo Imura

What made this arrest even more interesting though, is the fact that Japan is known for there strict gun laws. It is estimated that while the United States will see approximately 297 gun murders for every 10,000,000 people each year, Japan will only see 1. A total of 15 people were murdered in Japan in 2012. In the United States, we have seen that number eclipsed in a single weekend in Chicago alone.

Since the arrest, many had been speculating on what the sentence for Imura would be. I’ve heard anywhere from a slap on the wrist, to up to three and a half years years in prison. Today the sentence was was handed down in the Yokohama District Court, and the defendant, who claimed to have been unaware of any law prohibiting the 3D printing of firearms, and admitted his wrong, found out that he will be spending the next two years of his life in prison.

Prosecutors for the case argued that Imura could have caused major damage to society as he had made data for the 3D models of his firearms easily available on the internet.

“This has shown that anyone can illegally manufacture guns with a 3D printer, flaunting their knowledge and skill, and it is an offense to make our country’s strict gun controls into a dead letter,” stated Presiding Judge Koji Inaba.

im4

Imura’s sentence could still be appealed by his attorneys, however, it will certainly be used as an example by authorities to prevent others from printing out weapons at home. Ultimately, those who intend to commit a violent act with a 3D printed firearm likely aren’t the ones worried about the implications of doing so. As global governments decide how to best deal with this wave of technological concern, Japan has already made a clear statement.

Do you think that Imura’s sentence was warranted? Will other governments follow suit with strict laws like those found in Japan? Let’s hear your thoughts on Imura’s sentencing in the 3D Printed Gun Arrest forum thread on 3DPB.com. Below is the video which prompted authorities to ask.



Share this Article


Recent News

Controlled Powder Production for Advanced Research Applications

Takeaways From MILAM 2026: Defense’s Growing Role in Driving 3D Printing – Part II



Categories

3D Design

3D Printed Art

3D Printed Food

3D Printed Guns


You May Also Like

Featured

Velo3D Becomes First Qualified AM Vendor for US Army’s Ground Vehicles Program

One indicator that I’ve used to help me track the additive manufacturing (AM) industry’s progress in terms of its technical maturity is the relative progress that each U.S. military branch...

Nikon Records $591M Metal AM Write-Down, Maintains Long-Term Focus

Nikon (OTCMKTS: NINOY) has announced a large impairment loss tied to its Digital Manufacturing business, the part of the company that includes metal 3D printing and advanced manufacturing operations. This...

Sponsored

When a Factory Stops Being a Building and Starts Being a Machine

Metal manufacturing still carries the layout and logic of an older industrial age. Most factories run as a collection of isolated disciplines, each with its own equipment, staff, and data....

Takeaways From MILAM 2026: Defense’s Growing Role in Driving 3D Printing – Part I

The annual Military Additive Manufacturing Summit & Technology Showcase (MILAM 2026) once again brought together the defense sector’s top technologists, military leaders, and additive manufacturing (AM) innovators for three days...