Atama Dekkachi (頭でっかち): Too Big a Head
2026-10-05
Literally, atama dekkachi means “too big a head.” Figuratively, it describes someone full of information, knowledge, and opinions, but whose actions do not match their words.

Atama Dekkachi (頭でっかち): Too Big a Head
Literally, atama dekkachi means “too big a head.” Figuratively, it describes someone full of information, knowledge, and opinions, but whose actions do not match their words.
Such a person can explain what others should do, point out mistakes, and describe why something will never work. Yet when it is time to take action, they remain on the sidelines.
Knowledge is valuable. But knowing how something should work is different from making it work.
In business, it is easy to criticize a decision when you do not have to make one. It is easy to suggest improvements when someone else must carry them out. Taking responsibility changes our understanding. We encounter limits, make mistakes, and discover things that reading alone could never teach us.
Today, information is available almost instantly. We can gather facts, watch tutorials, and ask AI for answers. But access to information does not automatically give us judgment—or the courage to act.
I try to remind myself of this: before explaining what someone else should do, ask what I am willing to do myself.
We do not need to know everything before we begin. Sometimes, taking one small step teaches us more than another hour of discussion.
Wisdom grows when knowledge meets action.
Disclaimer: I use AI as a tool to help create images and proofread my writing. However, the ideas, opinions, experiences, and messages in my posts are my own. AI does not generate my posts for me. It simply helps me present my own words and ideas more clearly.

Kenichi Uchikura
Founder & CEO
Pacific Software Publishing, Inc. (PSPINC)
Uchikura & Co., LLC.
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ABOUT THIS BLOG
I was born and raised in Japan and have spent most of my adult life in the United States. Through this blog, I share Japanese culture, language, expressions, and wisdom. My goal is not to say one culture is better, but to explore different perspectives and what we can learn from them.
Your comments are always welcome.
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Kenichi Uchikura
Founder & CEO
Pacific Software Publishing, Inc. (PSPINC)
Uchikura & Co., LLC.
..-・**・-....-・・-..__..-・・-....-・**・-..
ABOUT THIS BLOG
I was born and raised in Japan and have spent most of my adult life in the United States. Through this blog, I share Japanese culture, language, expressions, and wisdom. My goal is not to say one culture is better, but to explore different perspectives and what we can learn from them.
Your comments are always welcome.
..-・**・-....-・・-..__..-・・-....-・**・-..