5Qs with DeLeon Judo Club Sensei Henry Kaku

Kaku, 78, was born in Japan to parents imprisoned during World World II, moved to the Bay Area as a child, and settled in Petaluma in 1985 with his own family; both of his children also still live in town. In addition to judo, he teaches origami and Japanese-American history.

5Qs with DeLeon Judo Club Sensei Henry Kaku
Sensei Henry Kaku teaches judo through Petaluma Parks and Recreation. (Thursday, Sept. 17, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)

I understand that you follow the philosophy, “The more knowledge you have, the more confident you will feel.” Can you explain what that means?

An analogy would be in martial arts, which I’ve been studying for almost 70 years. The more you learn, the more you don’t need to fight. The more you learn, the more you avoid getting into confrontations, both physical and verbal. Also, they say that you study history so that you don’t repeat history.

Sensei Henry Kaku teaches judo every week in Herzog Hall at the fairgrounds. (Thursday, Sept. 17, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)

The other thing that I’ve done for the past 30 years is I’ve given talks about what happened to Japanese-Americans during World War II. The more we know about what happened, hopefully, things like that won’t happen again in the future. And it just makes you more well-rounded when you are more knowledgeable about different things, and not so narrow-minded in terms of information. 

This applies to everything from knowledge of the world and knowledge of politics and history to martial arts. You can be more confident when you are having a discussion with someone. You may have differences in political opinion, but if you’re more knowledgeable about both sides of the story, then you’re more confident to feel comfortable with your own position and not be so negative or distracted by the opposite opinion.

Kaku teaches judo every week in Herzog Hall at the fairgrounds. (Thursday, Sept. 17, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)
Kaku teaches judo every week in Herzog Hall at the fairgrounds. (Thursday, Sept. 17, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)

Tell me more about your efforts to speak about the history of the Japanese-American experience during World War II. Do you make explicit ties to current events or political or social issues?

My main purpose is to keep the story alive. The first probably 10 to 15 years of my talking, it was just a general, generic history of the Japanese Americans and what they faced, and the living conditions of being in prison for four years, and their fears, what causes racism, or hysteria, etc., that caused all of this. And then I just briefly touched upon my family's personal experience of being deported and losing their U.S. citizenship. 

When Kaku's family was finally allowed to return to the United States after being deported to Japan, Kaku was issued this U.S. passport that used a family photo. He is pictured in the front center, age 7. Family photos were only allowed in passports that year, 1956; they have since been discontinued. (Tuesday, Sept. 22, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)
Henry's father, Keige Kaku, served in the U.S. Army during World War II. He was very vocal about being removed from service and placed in an incarceration camp for Japanese-Americans after the bombing at Pearl Harbor. (Tuesday, Sept. 22, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)
Kaku was born in Japan in 1948 after his parents, who were American citizens, were deported there. When they were allowed to return, Kaku was 8 years old. His birth name is Akira, but he has gone by Henry since arriving in the U.S. (Tuesday, Sept. 22, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)
A photo of the Japanese incarceration camp in Poston, Arizona, where Kaku's parents met and were married. (Tuesday, Sept. 22, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)

But in the last 10 years, it's really hit home more than ever before, and actually maybe even more than 10 years. Over 10 years ago, what was going on on the southern border, before President Trump, was the arrest of people and families and separating families from Mexico coming into the United States. And then especially with President Trump coming into the presidency the last term and this current term, I constantly, now more than ever before, draw parallels to what happened to the Japanese Americans and unfortunately what's happening today. This goes back to me saying, you know, learn the history, and hopefully you could do something about it. 

Kaku holds an American flag made of 1,000 origami cranes. (Tuesday, Sept. 22, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)

I tell high school kids that I speak to that what you could do, for example, could be just one small thing. If you find a neighbor's husband is taken away by ICE, for example, you could go and take them a bowl of casserole, and say, we're sorry that you're having a difficult time. At least this is what I could do. You maybe can't stop the deportation, but you could make your neighbor feel comfortable. And these little small acts of kindness really helped comfort Japanese Americans, especially in Sonoma County, which I know a lot of stories about, who were taken away and put in prison. Doing that little act of kindness is what I talk about when I give presentations to high schools about what happened to the Japanese Americans and parallels to today. 

Joe Lauritzen (left) has been studying judo with Sensei Henry Kaku (right) since he was 6 years old. Lauritzen brought a gift of sake to Kaku for his birthday. (Thursday, Sept. 17, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)

In your teaching of history, judo, and origami, is there a common thread?

I've been teaching origami all my life as well. I guess I'm considered an expert in origami. In all of them, my hope is that they become better than me – better than what I've become. And I've got a number of students who I could look up at and say, they've accomplished more in martial arts than I have, or they've mastered the art of origami to the point where they're making things that are beyond my ability now. And that's what teaching is all about: it’s sharing the knowledge that you have so that your students can become better and more accomplished than you are. 

Kaku's origami Snoopy. (Tuesday, Sept. 22, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)
Kaku's origami ornament. (Tuesday, Sept. 22, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)
Kaku's origami using special paper. (Tuesday, Sept. 22, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)
Kaku keeps special origami figures in a display case at his home. (Tuesday, Sept. 22, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)
Kaku's origami Yoda. (Tuesday, Sept. 22, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)
Several origami figures are displayed in Kaku's home in east Petaluma. (Tuesday, Sept. 22, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)
Kaku challenged his son, Allan, to see who could make the smallest origami. Allan won with this crane that sits on a pin. (Tuesday, Sept. 22, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)

Over the years you’ve been active in and even founded many nonprofits and community organizations in Petaluma. I’m curious what perspective this has given you on life here, and how things have changed over the last 41 years. 

My philosophy is that if I'm going to complain about something, I'm going to get involved in it, or if I want to see something happen, I'm not going to just sit on the outside and talk about it. I want to get involved, and one of the things that I've always been interested in is education. 

When I lived in San Francisco for 10 years, I was involved with San Francisco School Volunteers, and I worked there helping the school programs throughout the city. The moment I moved up here, I wanted to find out if there was anything similar. And here we have the Petaluma Educational Foundation. So the second year I was here, after I settled down, I called them up and I said, "I would like to be on your board.” And they said, "We've never had anybody call us and ask that.” But I served on their board for over 10 years, and got involved in a lot of their activities, and helped them raise funds for schools and teachers.

Since I’ve moved here, the population has almost doubled from 1985 to today. What I still like about Petaluma and all of Sonoma County is the urban growth boundaries. That was one of the highlights of the philosophy when we came to Petaluma. My wife looked at the city planning way back in 1985. There was talk back then about building the Rainier overpass. That’s one of the negative things about Petaluma – the Rainier overpass. That should’ve been built 20 years ago, 30 years ago. Overall, Petaluma has grown so much, but it still has a very small-town feeling, and everyone seems to know each other. 

Kaku at his judo class. (Tuesday, Sept. 22, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)

You’ve been very open about your own family’s history, but is there anything that these audiences or your students in other areas may not know about you that you’d like to share?

A lot of my friends know parts of me. I don’t think everybody knows all the different things. I’ve got people who learned origami from me when they were in kindergarten or first or second grade, and now they’re 40 years old, and they remember me for origami. Or someone who took judo from me 20 years ago, and they only stayed with me for six months or a year, they’ll remember me. So a lot of people know me from one thing or another, but not all the aspects. I get that every so often, where someone says, “Oh, I didn’t know you were an origami expert!” or whatever. 

As far as my family’s story, I’m not ashamed of it. The more people that know about it, the better. I’m not afraid of being exposed and being shown. 

Kaku holds up a photo of his father, Keige, who volunteered to fight in World War II and was kicked out of the service after Pearl Harbor and later incarcerated at a camp in Poston, AZ. (Tuesday, Sept. 22, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)
The Kaku kids, (left to right) Keiko, Henry, and Kazuo. (Tuesday, Sept. 22, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)
Kaku goes to school in Japan in 1957. (Tuesday, Sept. 22, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)
Kaku recently celebrated his 78th birthday. (Thursday, Sept. 17, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)
Kaku's dog, Joey, wears a custom-made judo gi. (Tuesday, Sept. 22, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)
Kaku and his dog, Joey. (Tuesday, Sept. 22, 2026. Photo by CRISSY PASCUAL/PETALUMA VOICE ©2026)
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Watch Henry Kaku fold an origami crane. (Video by CRISSY PASCUAL/PETALUMA VOICE ©2026)

This conversation has been lightly edited for clarity and readability.

Nate Seltenrich is an editor and reporter at Petaluma Voice. He can be reached at nseltenrich@petalumavoice.org.

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