Kosuzu Iwao Darts – DIAMOND Darts & Accessories at Diplomatgames

Kosuzu Iwao is one of the most exciting young female darts players from Japan. The Japanese player first made a name for herself on the professional soft darts scene and developed from a junior player to a tournament winner on the SOFT DARTS PROFESSIONAL TOUR JAPAN LADIES within just a few years. Her game is offensive, confident, and uncompromising – qualities that Target Japan also highlights in her official player profile.

Kosuzu Iwao is particularly known for her collaboration with Target Japan and the jointly developed DIAMOND Signature Dart Series. The fourth generation, the DIAMOND G4, was introduced in 2026 and is now available.

At Diplomatgames, you'll find Kosuzu Iwao darts and suitable Target Japan accessories. But which darts does Kosuzu Iwao play, what successes has she already achieved, and what distinguishes her DIAMOND darts from other player darts? Here you'll learn more about the career, playing style, and equipment of the Japanese darts player.

Kosuzu Iwao Profile

Name: Kosuzu Iwao
Japanese Name: 嵓 小鈴
Date of Birth: December 11, 1999
Nationality: Japan
Throwing Hand: Right
Dart Sponsor: Target Japan
Signature Series: DIAMOND
Current Tour: SOFT DARTS PROFESSIONAL TOUR JAPAN LADIES
Professional Debut: 2022
World Premium Stage Ladies: Winner 2022
PERFECT: Tour Winner 2022
PERFECT Rookie Ranking: 1st place in 2022
JAPAN LADIES: Tour Winner 2024
JSFD Japan Open Women Singles: Winner 2024.

Who is Kosuzu Iwao?

Kosuzu Iwao is a Japanese darts player who is active in both soft darts and steel darts.

Her professional career began in 2022. Iwao made her professional debut at the second stop of the SOFT DARTS PRO TOURNAMENT PERFECT Tour in Tokyo.

And already in her first year, it became clear that she was more than just another young talent.

On August 20, 2022, Kosuzu won the THE WORLD PREMIUM STAGE LADIES Division. Just a few weeks later, she achieved her first tour title at PERFECT Stage 16 in Hiroshima. At the end of the season, she was also named the number 1 in the PERFECT Women's Rookie Ranking.

This is a remarkable start to a professional darts career.

Kosuzu Iwao Moves to the JAPAN Tour

After the PERFECT season 2022, Kosuzu Iwao switched to the SOFT DARTS PROFESSIONAL TOUR JAPAN.

There too, it didn't take long for her to achieve her first major results.

In 2023, she finished second at Stage 3 of the JAPAN LADIES. In 2024, she reached another final at Stage 7.

On September 28, 2024, the next big step finally happened:

Kosuzu Iwao won JAPAN LADIES Stage 10 in Fukuoka, securing her first victory on this tour.

This confirmed her development from a successful PERFECT junior player to one of the interesting players on the Japanese professional tour.

Kosuzu Iwao's Greatest Achievements

Her most important results to date include:

• THE WORLD PREMIUM STAGE LADIES Division Winner 2022
• PERFECT Stage 16 Hiroshima Winner 2022
• 1st place in PERFECT Rookie Ranking 2022
• JAPAN LADIES Stage 3 Finalist 2023
• JSFD Japan Open Women Singles Winner 2024
• JAPAN LADIES Stage 7 Finalist 2024
• JAPAN LADIES Stage 10 Fukuoka Winner 2024
• SUPER DARTS 2025 Qualifier Tokyo Ladies Division Finalist.

The combination of successes in soft darts and in classic steel darts/WDF-related competitions makes Iwao particularly interesting.

What is Kosuzu Iwao's Playing Style?

Target Japan describes Kosuzu Iwao as a young player who pursues a confident and offensive playing style and is not intimidated by strong opponents.

This fits well with her career so far.

Iwao doesn't wait years, but actively seeks challenges and tries to compete at an ever higher level.

Her equipment is also designed for control and a reproducible release.

The DIAMOND series offers different grip areas and has been continuously developed over several generations.

What Darts Does Kosuzu Iwao Play?

Kosuzu Iwao is under contract with Target Japan.

Her own signature series is called DIAMOND.

Several generations and variants have now been released, including:

DIAMOND G1
DIAMOND G1 MAX
DIAMOND G2
DIAMOND G2 MAX
DIAMOND G3
DIAMOND G3.5
DIAMOND G4

This means Kosuzu Iwao already has an unusually extensive line of her own player dart series.

Target Japan describes the DIAMOND G3, for example, as a versatile straight barrel with grip areas over practically the entire barrel length. This makes the model suitable for both players who grip further forward and for rear-grippers.

Kosuzu Iwao DIAMOND G4

The latest generation is the Target Japan DIAMOND G4, which was introduced in April 2026.

Target developed the model again together with Kosuzu Iwao.

The most striking element is the so-called Triple Diamond Ring Design.

This design was inspired by stacked jewelry rings. The three ring areas have different depths and shapes, creating various grip sensations.

This should make it easier for the player to find their preferred grip position.

In the rear area, Target combines ring and taper cuts. In the front area, a comparatively mild shark cut is used.

Thus, the DIAMOND G4 combines striking design with a technically quite complex grip concept.

How Heavy are Kosuzu Iwao Darts?

Here one should not simply state a single weight, because the DIAMOND series is offered in various steel and soft dart versions.

The DIAMOND G4, for example, is available as:

18 g soft dart – 90% Tungsten, 42 mm barrel length
22 g steel dart – 90% Tungsten, 49 mm barrel length
24 g steel dart – 90% Tungsten, 49.5 mm barrel length.

Especially with Kosuzu Iwao, it is therefore more sensible to speak of the respective DIAMOND model, instead of generally claiming that she only plays a certain weight.

At Diplomatgames, you can compare the available Kosuzu Iwao models and select the right setup based on weight, barrel length, and diameter.

What is Special About Kosuzu Iwao DIAMOND Darts?

The DIAMOND series combines two things that often play a major role in Japanese signature darts:

technical function and striking design.

The G4, for example, features black and red design elements as well as the distinctive Triple Diamond motif. Target explains that the red accents are deliberately intended to pick up on Kosuzu Iwao's preferred color scheme.

The different grip zones simultaneously make the darts interesting for various grip positions.

Depending on the generation, there are:

• more compact barrel shapes,
• longer MAX versions,
• straight barrels,
• torpedo variants,
• soft tip versions,
• steel tip versions with Swiss Point.

Thus, DIAMOND is now more than just a single player dart – it is a complete signature series.

Kosuzu Iwao and Target Japan

Kosuzu Iwao is part of the Target Japan player team.

The collaboration is particularly close, as Target doesn't simply put her name on existing darts. The different DIAMOND generations are developed together with the player.

For the G4, Target explicitly describes the concept as a further development of her personal progress on and off the stage.

In addition to darts, matching accessories are now also available.

These include, for example, Kosuzu Iwao DIAMOND K-Flex systems, where the flight and shaft are combined into an integrated system.

The official Target model also takes up her DIAMOND identity with black tip, roses, and diamond motifs.

The Journey from Rookie to Tour Winner

Kosuzu Iwao's career has been remarkably fast so far.

She made her professional debut in 2022.

In the same year, she won:

THE WORLD PREMIUM STAGE LADIES,
a PERFECT tournament
and the Women's Rookie Ranking.

After that, she switched to the JAPAN Tour.

In 2023, she already reached a final, and in 2024, she won a JAPAN LADIES Stage for the first time.

In parallel, in 2024, she also won the JSFD Japan Open Women Singles.

This explains why Target Japan describes her as one of the young players with great future potential.

Kosuzu Iwao and Her Goal

Target Japan states a very clear goal for Kosuzu Iwao:

She wants to become the number 1 in the world.

Of course, this is an ambitious goal.

However, her career path so far shows that Iwao is willing to deliberately expose herself to stronger competitions and seek new challenges.

The switch from PERFECT to the JAPAN Tour was a good example of this.

Instead of staying in the familiar environment after a successful rookie season, she took the next step.

Kosuzu Iwao – A Player for the Future

Kosuzu Iwao is still relatively at the beginning of her career but has already achieved several interesting milestones.

In a short time, she developed from a PERFECT debutante to the:

World Premium Stage Winner, PERFECT Rookie Number 1, JAPAN LADIES Tour Winner, and Japan Open Winner.

In parallel, her Target Japan Signature Series has been continuously developed.

In 2026, the fourth generation of DIAMOND Darts was already released.

Especially for fans of the Japanese soft dart scene, Kosuzu Iwao is therefore a player whose further development promises to remain interesting.

Buy Kosuzu Iwao Darts at Diplomatgames

Are you looking for Kosuzu Iwao's darts or would you like to try out the Target Japan DIAMOND series?

At Diplomatgames, you will find various Kosuzu Iwao darts from Target Japan and suitable DIAMOND accessories, subject to availability.

The different generations sometimes differ significantly in terms of barrel shape, weight, and grip.

Therefore, pay particular attention to steel or soft tip, dart weight, barrel length, diameter, barrel shape, and grip position.

Especially the choice between classic DIAMOND models, MAX versions, and the current G4 makes it possible to select a model that not only looks good but also suits your personal throw.

Discover the available Kosuzu Iwao darts at Diplomatgames now and find your perfect Target Japan DIAMOND dart.

FAQ – Frequently Asked Questions about Kosuzu Iwao

What Darts Does Kosuzu Iwao Play?

Kosuzu Iwao plays Target Japan Darts. Her own signature series is called DIAMOND and is now available in several generations as soft and steel darts.

What is the Current Kosuzu Iwao Dart Generation?

The current generation is the Target Japan DIAMOND G4, which was introduced in April 2026. It is available, among others, as an 18-g soft dart and as 22-g and 24-g steel darts.

What are Kosuzu Iwao's Greatest Achievements?

Her most important achievements include winning the THE WORLD PREMIUM STAGE LADIES 2022, a PERFECT tour victory in 2022, 1st place in the PERFECT Rookie Ranking 2022, winning the JAPAN LADIES Stage 10 2024, and the title at the JSFD Japan Open Women Singles 2024.

What is Kosuzu Iwao's Playing Style?

Target Japan describes Iwao as an offensive and confident player who is not intimidated even by strong competition.

What Does DIAMOND Mean for Kosuzu Iwao?

DIAMOND is the name of her Target Japan Signature Series. The diamond motif is reflected in both the barrel design and accessories such as her K-Flex.

Where Can You Buy Kosuzu Iwao Darts?

You can buy Kosuzu Iwao darts at Diplomatgames. Here you will find Target Japan DIAMOND Darts and suitable accessories, subject to availability.