Do you like iaido (batto-jutsu)? Unlike baseball or soccer, there are very few opportunities to see or practice iaido. The exact number of practitioners is unknown, but it is estimated that only tens of thousands of people worldwide practice iaido. Considering the global population of approximately 8.1 billion, iaido can be said to be an extremely niche activity. Despite being such a niche practice, I absolutely love iaido. I practiced kendo in elementary and junior high school, but I distanced myself from the way of the sword afterward. After being away from the sword world for decades, I was reintroduced to it by chance in August 2014, when I was invited to a tameshigiri (test cutting) experience event. It was an event where one could experience cutting tatami mats with a real sword. I was completely hooked by that experience and joined the iaido dojo that hosted the event. After joining, I focused almost exclusively on cutting tatami mats, hardly practicing kata (forms). Initially, the act of cutting itself was enjoyable, but after about six months, I began to question whether this was enough. I started feeling a sense of emptiness in the superficial act of cutting or not cutting. Additionally, the interpersonal relationships at the dojo became somewhat cumbersome, and I ended up taking a break. The fact that my return to the way of the sword ended in such a half-hearted result left me feeling unsettled for a while. It was during this time that I encountered "Sekiguchi-ryu Batto-jutsu," the art I am currently dedicated to. In November 2016, I was invited to a martial arts-related event held in Shinjuku. The host was an acquaintance of mine, so I decided to attend after not seeing them for a long time. It was at this event that I first saw "Sekiguchi-ryu Batto-jutsu" live. Until then, I had no knowledge of Sekiguchi-ryu Batto-jutsu. When I saw the demonstration of Sekiguchi-ryu Batto-jutsu by Master Yamada Toshiyasu, I was profoundly shocked. It was like being struck by lightning. Master Yamada's forms were unpretentious and bold, and the speed of his sword-drawing was as fast as lightning. "This is it! This is the only way! I want to embody this technique!" I thought. There was no logic or reason, I simply wanted to practice this style. I felt it was fate that I learned about this style at that moment. As the event ended and Master Yamada was leaving the venue, I rushed to him and asked to join his dojo on the spot. From that day on, I became a practitioner of Sekiguchi-ryu Batto-jutsu. Our dojo has 11 very important forms that are passed down. Even as a new member, I was eager to learn the entirety of the forms that Master Yamada had demonstrated at the Shinjuku event, so I searched for any literature that might provide hints. After searching online, I found potential resources at the National Diet Library and managed to obtain them for a rough overview. Subsequently, Master Yamada taught me the procedures for the 11 basic forms. Over the course of about a year, I memorized the movements for all 11 forms, regardless of whether I could execute them perfectly. [SHIKANZANKI] Training in iaido mainly involves solitary practice. It is a modest practice of repeatedly performing forms against imaginary opponents while seeking the principles contained within the forms. At one point, the image of the imagined opponent overlapped with myself. In other words, it felt like I was applying techniques against myself. "Ah, I am cutting myself," I thought. Form practice seemed to be about relentlessly cutting away both my physical being and my weak heart. There is a Zen term called "shikan-taza" (just sitting) which means sitting in meditation without any distractions. In that sense, what I was doing could be termed "shikan-zanki" (just cutting oneself). I had the opportunity to see the illustrated manual of Sekiguchi-ryu Batto-jutsu owned by Master Yamada, and I was captivated by the drawings that depicted the forms. These drawings had a modern "cute and loose" style that I found very appealing. I decided to create a T-shirt design based on these drawings. I meticulously corrected each drawing in Photoshop and converted them to vectors in Illustrator. This is how the "ZAN T-shirt" was created.