StarLeague Launches Free Big Five Personality Assessment 'Decider® lite'

StarLeague Inc. (Headquarters: Shibuya-ku, Tokyo; CEO: Takahumi Nakuma) announced the launch of 'Decider lite,' a free Big Five personality assessment tool, on July 13, 2026.

The tool is accessible via web browsers on smartphones and other devices, allowing anyone to use it easily without registration.

Background of Service Launch

In recent years, 16-type personality assessments based on or derived from MBTI have become widely used, primarily as free web tools. This trend is not uniform globally and is particularly prominent in East Asia, including Japan.

MBTI is an outdated methodology proposed in the 1960s and has never become mainstream in academic research. There is no compelling reason to revisit it as a classification system for describing personality.

The theory with proven support in academic research is the Big Five.

With the establishment of the Big Five model, social sciences involving human behavior have predominantly adopted personality description as a mediating framework.

Overview of Decider lite

StarLeague has been a pioneer in providing 'Decider,' a corporate management SaaS based on the Big Five model.

Now, to offer a trustworthy personality assessment tool for everyone, the company has developed Decider lite entirely from scratch.

Decider lite introduces newly defined categories corresponding to the five factors of the Big Five:

1

O (Organized, Orderly)

I (Impulsive, Impulsive)

2

R (Relaxed, Laid-back)

W (Worried, Anxious)

3

D (Dreamy, Imaginative)

T (Traditional, Conventional)

4

H (Hot, Passionate)

F (Flat, Unemotional)

5

A (Attached, Communal)

S (Separate, Independent)

By combining these, 32 personality types—such as ORDHA or IWDFS—are identified, enabling anyone to conduct scientific self-analysis easily.

Furthermore, leveraging the intensity differentiation of Big Five traits, 1,024 derivative patterns can be described. Ultimately, types such as O+RDHA are possible.

Understanding personality through an appropriate methodology provides insights into subtle aspects of social life, including daily habits, work-related considerations, and interpersonal challenges.

Decider lite Service URL

Available at the following URL:

Decider lite: https://www.star.careers/biz/lite/

CEO Statement

As of 2026, the Big Five personality model plays a central role as a standard language in academic research, with new findings emerging daily thanks to the efforts of researchers worldwide.

Meanwhile, in the daily lives of professionals and students, the concept of 'truth' has become blurred, leading many to turn away from these scientific insights.

The decline of publishing, search engine bias, and the spread of social media are no longer new phenomena—they are established realities that have persisted for over 15 years. On this unstable foundation, AI is now beginning to rise.

The greatest problem arising from misunderstanding personality is the pressure to overcome weaknesses through sheer effort.

With this chaotic situation in mind, Decider lite prioritizes clarity above all.

Its greatest innovation is the simplification into 32 concise types.

Since 2 to the power of 5 (two categories across five factors) forms the minimal classification, no simpler scientifically valid system is possible.

By understanding the personality types provided by Decider lite, users will gain the ability to directly apply the broader scientific knowledge of personality analysis.

CEO Takahumi Nakuma

About Decider®

High-precision personality analysis based on the Big Five has brought new insights to management science.

— Strategy lies not in the business model, but in manager selection.

Decider® provides a next-generation management framework through an accessible cloud platform.

It implements scientifically standardized methods in internal surveys ahead of global peers.

It enables easy analysis of 'what kind of organization can be built' based on individual talents.

Aptitude testing is standard-equipped; consistency in hiring is naturally essential.

Once you have an absolute coordinate system like GPS, human resources are no longer uncertain.

https://www.star.careers/biz/

Trademark Registration No. 6629684, U.S. Registered Trademark 98236069

Company Overview

Company Name: StarLeague Inc.

URL: https://www.star.careers/company/

Inquiry: https://www.star.careers/company/inquiry/