How Pro Soccer Players Use Journals — Reflection Techniques from World-Class Examples

Photo by Riccardo Bernucci on Unsplash

Research by Cleary & Zimmerman (2001) demonstrated that expert basketball players set more specific goals, chose more technique-oriented strategies, and displayed higher self-monitoring ability than non-experts. The same pattern holds in soccer: Toering et al. (2009) showed that reflection ability in elite youth players is strongly correlated with performance level.

Pro players who keep journals share three key traits:

1. Specificity --- Instead of writing "today went well," they record something like "why my through-ball in the 68th minute found its target"
2. Consistency --- They accumulate data not from one match, but from hundreds of matches, allowing patterns to emerge
3. Honesty --- They write openly about weaknesses, anxieties, and failures. Self-protective entries only hinder growth

Nakamura began his soccer journal on the advice of a sports psychology instructor at Toko Gakuen High School. What was originally suggested as a method for "controlling your mindset to win matches" became a habit that lasted over 15 years.

In his 2009 book 'The Soccer Notebook That Makes Dreams Come True' (Yume wo Kanaeru Soccer Note), Nakamura revealed the contents of his journals. They contained candid entries about his weaknesses, frustrations, and anxieties --- exposing the inner struggles behind one of Japan's most celebrated players.

It's about the quality of your running and your ability to read the game. If I had those, I could have covered less distance. And then I could have touched the ball more, controlled the game, and made more decisive plays.

— Nakamura Shunsuke, Soccer Digest interview

The Structure of Nakamura's Notebook

• Match analysis --- Recording specific in-game decisions and alternative options he could have chosen
• Training log --- Practice drills and self-assessed performance ratings
• Mental notes --- Pre-match psychological state and strategies for handling pressure
• Visualization --- Concrete images of plays he wanted to execute in the next match
• Statistics --- Accumulating numerical data and analyzing trends

What stands out is that Nakamura first wrote "play in Spain" as a goal in his ninth notebook --- and five years later, it became reality when he signed with RCD Espanyol. His notebook is a rare example that integrates both reflection and goal-setting, making it an ideal model of self-regulated learning.

In his famous sixth-grade graduation essay, Honda declared: "When I grow up, I will become the best soccer player in the world." He went on to describe, in specific terms, playing in Serie A and performing at the World Cup. While most children write wishes in the form "I want to become...," nearly every sentence in Honda's essay uses the declarative "I will become..."

To become the best in the world, you have to train harder than anyone in the world. That's why I'm giving it everything I've got right now.

— Honda Keisuke, sixth-grade graduation essay

Honda later systematized this approach into what he calls a "Dream Notebook" and even turned it into a commercial product. Organized on a weekly basis, it follows "five principles for making dreams come true" and provides a format for recording daily actions toward long-term goals.

Nakamura Style vs. Honda Style

• Nakamura style (Analytical) --- Reviews past matches in detail to improve the consistency of his play. Focus: "accurately understanding where I am right now"
• Honda style (Reverse-engineering) --- Works backward from a future goal, recording what needs to be done today. Focus: "a clear route to where I'm going"

Hasebe's core philosophy is that "the mind is not something you train --- it is something you organize." Among his 56 specific habits are practices like "spend 30 minutes alone every day" and "reset your mind by visiting a hot spring" --- many of which prioritize dialogue with oneself.

This approach aligns with the concept of 'metacognition in sport' proposed by MacIntyre et al. (2014) in Frontiers in Psychology. Their research showed that elite athletes are experts not only in physical execution but also in planning, metacognition, and reflection. Hasebe's habits are essentially a system for practicing metacognition on a daily basis.

His structured approach to pre-match mental preparation and post-match psychological recovery can be seen as a practical application of the 'self-regulation of recovery' framework described by Balk & Englert (2020).

Pep Guardiola --- The Obsessive Tactical Notebook

In Marti Perarnau's books 'Pep Confidential' (2014) and 'Pep Guardiola: The Evolution' (2016), Guardiola's obsessive note-taking habits are documented in detail. At restaurants, on vacation, in bed late at night --- his mind is constantly turning over tactical ideas, which he meticulously records in detailed notebooks.

However, Guardiola's notebooks are not personal growth journals --- they are tactical blueprints for his team. They are elaborate preparation notes designed to drill new formations into his players. This is fundamentally different from the Japanese culture of "players writing for themselves."

Andrea Pirlo --- "I Think Therefore I Play"

Pirlo's autobiography 'I Think Therefore I Play' (2013) --- as its title suggests --- is a philosophical exploration of the relationship between thought and play. Whether the legendary AC Milan, Juventus, and Italy deep-lying playmaker kept a personal notebook is not publicly known. However, in his book he describes soccer as "not a war, but an art and a philosophy," and he articulates in remarkable detail the decision-making process behind his role as a deep-lying playmaker.

After surveying the journaling methods of professional players and coaches worldwide, the Footnote Editorial team identified the following three shared principles:

Principle 1: Specificity

Nakamura's notes on "the reasoning behind my through-ball in the 68th minute," Guardiola's notes on "the rationale for a specific formation change" --- these are not vague impressions but concrete descriptions of specific moments, decisions, and outcomes. Cleary & Zimmerman (2001) demonstrated that the more expert the athlete, the more specific their goal-setting and strategy selection.

Principle 2: Honesty

Just as Nakamura wrote candidly about his weaknesses, anxieties, and frustrations, effective reflection begins with honest, unguarded entries. Pennebaker's (2018) meta-analysis, drawing on over 100 studies, showed that writing honestly about emotional experiences is effective in improving psychological well-being and reducing rumination.

Principle 3: Consistency

Nakamura's 18-year practice, Honda's dream notebook from childhood onward, Guardiola's round-the-clock tactical thinking --- none of these are occasional jottings but sustained, ongoing habits. Jonker et al. (2010) surveyed 222 talented athletes and found that reflection skill was the factor that distinguished the highest-level competitors. Reflection is not a one-time event --- it is a long-term process that reveals true patterns only through accumulation.