Overview

In this episode of *Yuru Gengogaku Radio*, hosts Horimoto and Mizuno, joined by guest Ida from the *Tsumidoku Channel*, dissect the psychology and behavioral economics behind sustained effort. The central thesis, drawn from the book *Effort Can Be Systematized*, is that willpower is a myth—real, lasting effort comes from designing systems, environments, and prompts that bypass the unreliable human will. The conversation is lively and self-aware, with Mizuno positioning himself as a self-described "effort addict" who treats himself like a machine, while Ida embodies the opposite extreme: someone who cannot sustain any habit and openly admits to gaming the system. The stakes are practical: how to make effort automatic, and whether becoming an "effort addict" is actually desirable.

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0:02The Myth of Willpower: Effort Is Not About Will

The episode opens with a stark contrast between the three speakers. Mizuno declares that he can sustain effort easily—he has kept a notebook for six years, writes regularly, and juggles multiple projects. Ida, by contrast, admits he started strength training and quit after two days. Horimoto notes that he is somewhere in between. Mizuno explains that the book *Effort Can Be Systematized* (行動経済学的な観点から努力を続けられる方法をまとめた本) argues that effort should not be powered by willpower at all. Instead, the core claim is that "effort is not something you do with will; it is something you continue with systems."

Mizuno emphasizes that many people, especially successful ones, attribute their achievements to willpower, which leads others to believe they just need to "try harder." But behavioral economics shows that will is the least reliable thing. The book's author is a behavioral economist who consults for companies and local governments on how to get consumers or users to sustain behaviors—like exercise, energy saving, or service usage. The insight is that the same principles apply to personal effort: stop treating yourself as a creature of will and start treating yourself as a system to be engineered.

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9:22Environment as System: Remove the Path of Least Resistance

Mizuno shares a concrete example of how he redesigned his environment to boost productivity. When he lived at his parents' home, his study desk was next to a futon that could be laid out instantly. He would come home, collapse onto the futon, and scroll on his phone or read. When he moved to Tokyo, his first apartment was a studio where the bed was always within reach. But in his current home, he separated the bedroom from the workspace, and crucially, he eliminated any place to lie down in the workroom. Now, when he comes home, he sits at his desk, turns on his PC, and within three minutes he is working. His conclusion: "If you remove the place where you can immediately lie down, your productivity skyrockets."

Horimoto agrees, noting that when he lived in a studio, he would also collapse onto the bed immediately. Ida, however, resists the logic. He admits that even if he removed the bed, he would just lie on the floor. Horimoto jokes that Ida is a "stubborn child" who cannot be managed. Mizuno then pivots to another environmental fix: punctuality. He used to be chronically late because he lived 20 minutes by bicycle from the station, and he would optimistically assume he could make it in 15 minutes if all the traffic lights were green. When he moved to a place two minutes from the station, the margin of error shrank to 30 seconds, and he stopped being late. The lesson: reduce uncertainty in your environment to reduce failure.

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16:35Give Yourself a Prompt: The Power of Implementation Intentions

Mizuno introduces the concept of "implementation intentions" (実行意図) from the book. Instead of setting a vague goal like "go to the gym," you specify exactly when, where, and how you will do it—for example, "on four out of five weekdays, I will go to the gym on my way home from work." This turns a goal into a concrete plan. Mizuno gives his own example: he reads a dictionary every day. His implementation intention is "after work, in my room, while drinking alcohol." Since he wants to drink, opening the bottle automatically triggers the dictionary reading. He also pairs exercise with YouTube: he only allows himself to watch YouTube while working out, so if he wants to watch, he has to exercise.

Ida, however, finds even setting implementation intentions exhausting. He says, "I want someone to give me a prompt. I don't want to decide it myself." Horimoto jokes that Ida needs an "implementation intention for setting implementation intentions." Mizuno reframes the idea: "Think of yourself as an AI. If you give a vague prompt, it won't work. But if you give a specific prompt—like 'list 1000 examples'—it works. Setting an implementation intention is like writing a prompt for yourself." He recounts a story about a writer friend who wanted AI to research a topic but found that asking for "interesting examples" failed. The solution was to ask for 1000 examples and let the AI run all night. The specificity of the prompt made the system work.

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23:27Cultivate Intrinsic Motivation: Find the Joy Inside

The second major characteristic of "effort addicts" is that they cultivate intrinsic motivation. Mizuno explains the distinction: extrinsic motivation comes from external rewards—money, praise, recognition—while intrinsic motivation comes from within, like the desire to improve or the pleasure of the activity itself. Studies show that extrinsic motivation can get you started but rarely sustains effort over the long term. Horimoto summarizes: "You have to turn the means into the end." If you exercise only to become attractive, the exercise is a chore. But if you enjoy the feeling of your muscles growing, the exercise becomes its own reward.

Mizuno shares a personal story from his high school exam period. He hated studying at first, but he realized that he genuinely enjoyed making vocabulary flashcards. He started creating flashcards obsessively—he would fill his bag with 20 small ring-bound notebooks. The act of making the cards became the goal, and studying was a side effect. He says, "I seriously thought I was born to make vocabulary flashcards." The key insight is that the inner voice saying "I enjoy this" is quiet and easy to miss when you are busy or stressed. He learned to listen to that small voice and amplify it.

Ida chimes in with his own example: he hates clocking in and out for work, but he loves programming. So he built an automated time-tracking script. The problem was that his company noticed the timestamps were too perfect and told him to stop. He then considered adding randomness to make it look natural, but that was also forbidden. Horimoto jokes that Ida's approach was "almost there, just accidentally illegal." The point is that finding a task you enjoy—even a small part of a larger chore—can make the whole process sustainable.

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32:01Growth Feedback: Seeing Progress Keeps You Going

Horimoto brings up the book *Drive* by Daniel Pink, which breaks down motivation into three components: autonomy (the freedom to decide how to work), mastery (the feeling of getting better), and purpose (the sense that your work matters). He notes that mastery is often overlooked but is incredibly powerful. When you can see yourself improving, you become addicted to the activity. Mizuno agrees, recalling his exam strategy: he would put sticky notes on every word he didn't know in his vocabulary book, then peel them off as he memorized them. The pile of removed sticky notes was a visible measure of growth. "It felt good," he says. "I could see how much I had learned."

The hosts connect this to why strength training is so popular: progress is visible and measurable. You can lift heavier weights, see changes in the mirror, and track reps. By contrast, learning English or other abstract skills offers slow, invisible progress. Horimoto also points out that YouTube analytics are designed to exploit this same mechanism. The platform shows you how your recent videos rank against your past performance, and it praises you when you do well. Ida admits that YouTube has succeeded in making him work hard when nothing else could. "You guys couldn't change me," he says, "but YouTube did." The conversation turns darkly humorous as they imagine a world where every aspect of life is gamified with real-time performance metrics—an AR glass that tells you your current conversation is "9th out of your last 10 conversations." Horimoto jokes that it would be terrible but effective.

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38:14Don't Trust Your Will: The Final Lesson

Mizuno summarizes the episode's core message: "Don't trust your will." He reveals that he even wrote the script for this episode using the same systematized approach. During a period when he was extremely busy with his own book launch and Ida was unavailable, he volunteered to write the *Tsumidoku Channel* script. To force himself to do it, he announced in the supporter community that he would start writing at a specific time and streamed the process live. The public declaration made it impossible to back out. Ida admits he tried the same tactic recently—he started a live stream to write a script, but after five minutes, he quit. "I thought, 'This is hard,' and I stopped," he says. Horimoto is baffled: "But you started! The hardest part is starting!" Ida's response: "I was still in the low-motivation phase, and I just couldn't push through."

This leads to the concept of "time discounting" (時間割引率). Mizuno explains it with a simple question: would you rather have 1000 yen now or 1500 yen in one year? Most people would take the money now because waiting costs something. The same logic applies to effort: would you rather go drinking tonight or have a great book in two years? Most people choose the immediate pleasure. But Mizuno says his time discount rate is essentially zero. He treats future rewards as if they were present. During his book writing, he turned down invitations to travel because "the time spent traveling could have been spent on the book." Horimoto finds this disturbing: "You can't enjoy the present. That sounds like a recipe for unhappiness." Ida agrees, saying he often thinks during parties, "I should have stayed home and worked." He recognizes that this mindset helps him produce, but he also suspects he is missing out on happiness.

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41:00Mizuno's Abnormal Time Discount Rate

Mizuno elaborates on his unusual relationship with time. He explains that when he was writing his book, he set his own deadlines two months ahead and told his editor he would deliver chapters early—even though the editor never asked for that. He did it to create external pressure. But the deeper issue is that he cannot enjoy leisure activities because he is always calculating the opportunity cost. "I can't focus on having fun," he says, "because I keep thinking about the book I'm not writing." Horimoto jokes that if you offered Mizuno 1 million yen in 100 years, he would say "great!" and be equally happy as if he got it today—even though he would be dead. Ida adds that this is not admirable; it is pathological.

The episode ends with a teaser for the next installment, which will air on the *Tsumidoku Channel*. The next book is a philosophy text that examines the downsides of being an "effort addict." The hosts promise a three-way discussion about whether it is better to live in the moment like Ida or to sacrifice the present for future gains like Mizuno. They acknowledge that there is no easy answer, but the conversation itself might help listeners find their own balance.

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Conclusion

This episode matters because it reframes effort from a moral virtue into an engineering problem. The hosts do not glorify hard work; instead, they show that sustained effort is the result of clever system design, not heroic willpower. The most memorable moments come from the tension between Mizuno, who has optimized himself into a machine that cannot enjoy the present, and Ida, who cannot sustain any habit at all. Their dynamic makes the advice feel grounded: the techniques work, but they come with tradeoffs. The episode leaves the listener wondering whether becoming an "effort addict" is a goal worth pursuing—and that question is exactly what the follow-up episode promises to explore.

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要点

• Effort should not rely on willpower; it should be built into systems, routines, and environmental design.
• Implementation intentions—specific plans for when, where, and how to act—are far more effective than vague goals.
• Remove temptations and friction from your environment: separate workspaces from sleeping areas, and reduce uncertainty in your commute.
• Treat yourself like an AI: give yourself precise prompts rather than hoping motivation will strike.
• Intrinsic motivation (enjoying the activity itself) sustains effort far longer than extrinsic rewards like money or praise.
• Visible progress feedback—like peeling off sticky notes or watching analytics—keeps you engaged by making growth tangible.
• Time discounting explains why people choose short-term pleasure over long-term gain; effort addicts have an abnormally low time discount rate, which helps them produce but may harm their ability to enjoy the present.
• Public declarations and social accountability can force action even when internal motivation is absent.