“I want a soundproof room, but I can’t afford hundreds of thousands of yen…” “I’m in a rental, so I can’t place a heavy soundproof room…”
Among creators and teleworkers with such concerns, the simple soundproof room “OTODASU” is now explosively popular.
Believe it or not, it’s available from under 100,000 yen, and what’s more, it’s so easy that it can be assembled without tools. As of 2026, the lineup has become quite extensive, including large models that can fit gaming chairs and high-performance models in collaboration with Shimamura Music.
In this article, we’ll give a thorough explanation of the entire OTODASU series, which continues to evolve, and its much-anticipated capabilities: “Actually, how much sound can it block?”
What is OTODASU? Basic Specs and Features#
OTODASU is a simple soundproof room developed by “Coolish Music,” a venture company in Yokohama. The biggest feature is the use of lightweight materials such as plastic cardboard for the wall materials. As a result, it has achieved benefits that overturn the conventional wisdom of soundproof rooms: “cheap, lightweight, and simple.”
Featured Lineup for 2026#
Currently, the following models are developed according to the usage:
| Model Name | Estimated Price | Features | Recommended Usage |
|---|---|---|---|
| OTODASU II | 99,900 JPY - | The series standard model. Overwhelming cost-performance. | Telework, light calls |
| OTODASU DEKA / DX160 | Around 200,000 JPY+ | Spacious design supporting gaming chairs and dual monitors. | Game streaming, long-hour work |
| OTODASU DX 145 PRO | 400,000 JPY range | High-end model complete with sound-absorbing materials and fans. | Full-scale streaming, vocal recording |
| S-OTODASU II LIGHT | Around 140,000 JPY | Shimamura Music collaboration. Detailed Review | Instrument practice (light music) |
In particular, the “OTODASU DX 160” series, which appeared at the end of 2025, has overcome the weaknesses of simple soundproof rooms that were often said to be “cramped and hot,” and it’s drawing attention as it can create a comfortable streaming environment.
Pros: Why is OTODASU Chosen?#
1. Overwhelming “Lightness” and “Ease of Assembly”#
Full-scale soundproof rooms from Yamaha and others weigh hundreds of kilograms and may require floor reinforcement work. However, OTODASU II is extremely lightweight, starting at about 30kg. It’s at a level where even a single woman can move it. Assembly is also tool-free, just by fitting parts together. The biggest charm is that it can be easily introduced even in rental properties.
2. Cost-Performance#
In a market rate where full-scale soundproof rooms start from 1 million yen, being able to start from 100,000 yen is exceptional. It can be said to be the optimal solution for entry-level users who “first want to create an environment.”
3. Design with a Sense of Freedom#
Many models have all-white panels and large windows (transparent panels), and a characteristic is that there is little sense of oppression even when you are inside.
Cons: Points to Know Before Purchasing#
1. Soundproofing Performance Is at a “Simple” Level#
This is the most important part. The soundproofing performance of OTODASU is said to be around Dr-15 to 20. This is a level where “speaking voices to the next room become difficult to hear,” and it is not something that makes it completely silent.
- Good at: Speaking voices, keyboard typing sounds, PC fan noise
- Bad at: Drums, brass instruments, screaming-style streaming, heavy bass
If you want to sing seriously or play instruments, you need to devise ways such as pasting sound-absorbing materials separately or choosing higher-end models (PRO version).
2. Heat Mitigation Necessary#
Because of its high airtightness, the room temperature tends to rise in summer. Introduction of a dedicated ceiling fan (optional) and frequent ventilation are mandatory. If you bring a PC inside to play high-load games, think firmly about heat exhaustion countermeasures with circulators, etc.
Danbotchi vs. OTODASU: Which Is Better?#
It is often compared with the original simple soundproof room, “Danbotchi.”
- Danbotchi: Made of paper cardboard. Very cramped, but its sound absorption has a warmth unique to paper. Cheap, but its durability is as you’d expect for paper.
- OTODASU: Made of plastic cardboard. Strong against water and dirt, and has high durability. Stylish appearance.
As of the 2026 trend, the number of people choosing OTODASU for its durability, design, and variations in width is increasing.
Conclusion: OTODASU Is Recommended for These People!#
- People who don’t want their family to hear meetings during telework
- People who want to do voice chat or light game streaming late at night
- People who are worried about floor load capacity or delivery routes in rental apartments
- People who want to build their own “base” with a budget of 100,000 to 200,000 yen
Conversely, those who say “I want to do professional-level recording” or “I want to play the saxophone late at night” should raise their budget and consider Yamaha’s Avitecs and others.
OTODASU boasts the strongest cost-performance in terms of “soundproofing daily sounds.” If it suits your usage, there shouldn’t be a better buy than this.
