About

About the Developer

I am an IT engineer and independent builder working to create systems that help reduce loneliness, emotional harm, and communication risk.

Profile

Naohisa Aoki / @na0AaooQ

IT Engineer（infrastructure engineer）/ Independent Builder

Through both professional work and independent development, I aim to create systems that are practical, sustainable, and gentle for the people who use them.
We are developing a series of products called "Kokoro Mimamori" (Heart-Watching Guardian) to gently protect people's hearts.
As part of the "Kokoro Mimamori" series, we publish products: "Kotoba Mimamori" (Word-Watching Guardian), "Gazou Mimamori" (X Sensitive Image Protection), and "Kotoba Uke Mimamori" (A gentle pause before words on X).

My favorite phrases are "Daiichi Daiman Daikichi" (meaning "One for all, All for one") and
"Sanpo Yoshi" (meaning "Good for the seller, good for the buyer, and good for society").

Business Information

Business Information

The following information is provided as my registered sole proprietorship details.

Business Name
Kokoro Mimamori
Representative
Naohisa Aoki
Occupation
Freelance Engineer
Business Activities
Planning, development, and operation of web services, and software development
Business Address
Nishishinjuku Mizuma Building 2F, 3-3-13 Nishi-Shinjuku,
Shinjuku-ku, Tokyo 160-0023, Japan
Contact
Contact Please take a look.

About Kokoro Mimamori-kun

Kokoro Mimamori-kun is a warm symbol character who helps express the values behind Kokoro Mimamori and its gentle approach to communication.

Kokoro Mimamori-kun is the symbol character of Kokoro Mimamori.

He represents the idea of creating gentle tools that support thoughtful communication and quietly protect people's hearts.

Designed like a small shield for the heart, he carries a sense of kindness, warmth, cuteness, and simplicity.

The services created under Kokoro Mimamori are not intended to blame or restrict people. They are designed to help people face words and information with a little more safety and peace of mind. Kokoro Mimamori-kun helps express that idea in a soft and friendly way.

A short greeting video from Kokoro Mimamori-kun, sharing his wish to gently protect everyone's heart.
Warm illustration expressing the gentle wish behind Kokoro Mimamori

This illustration was kindly created by AI Oji | AI × No-Code from Your 40s, a supporter of Kokoro Mimamori. It expresses the warm and gentle wish behind Kokoro Mimamori: to help protect people's hearts with care.
Please note that we have received permission to use the image illustration on the website.

Illustration by: AI Oji | AI × No-Code from Your 40s (X: @AIojix)

Goals and Values

What I want to build

One of my long-term goals is to help create a society in which people are less likely to feel isolated or emotionally broken.

Mission

I aim to build systems that make communication risks more visible and support gentler, more thoughtful interaction.

Why this matters to me

Words and expressions can encourage people, but they can also cause deep harm. That is why I want to use technology to create environments that feel safer and more supportive.

How I Approach Development

Sincerity and clarity

I value products that are understandable, calm, and practical. I try to avoid designs that create unnecessary pressure or rely on overly strong messaging.

Supporting rather than controlling

Rather than forcing people into one way of thinking, I want to create systems that help them make safer and more confident choices.

Balancing function and emotional safety

I care not only about what a product can do, but also about how it feels to use it. Usability and emotional safety should work together.

Technical Background

Technical Background

My experience has been built over many years of practical work across infrastructure, databases, web systems, development, operations, and continuous improvement.

Infrastructure and operations

Over a long career in IT, I have worked extensively as an infrastructure engineer, supporting web services and business systems through planning, design, implementation, operations, and improvement.

Broad hands-on experience

My work has covered databases, servers, web systems, and operational processes. I value systems that are not only technically sound, but also maintainable in practice.

Furthermore, in creating systems that protect people's hearts, we handle every process from start to finish, prioritizing the happiness of our service and system users, eliminating sadness, and solving problems.

Systems that support people

I have also been involved in areas such as project management, team support, governance, and budgeting. These experiences strengthened my belief that good systems should reduce burden, not rely only on personal effort.

Personal Note

A Little More About Me

My work is shaped not only by technical practice, but also by a long-standing interest in emotionally meaningful creation.

I have long been drawn to games, animation, manga, and other forms of creative work that can move people emotionally.

That interest still shapes how I think today. I want to build systems and products that are not only useful, but also calm, humane, and protective in the way they support people.

Through independent development, I continue exploring how technology, language, and thoughtful design can help create safer digital spaces.

This portfolio is a place where I share both the practical side of my work and the ideas behind the products I am trying to build.

If you would like to learn more about my work or get in touch, please visit the pages below.

View Products Contact