After a Lunchtime Joke, Three Men Turned Japanese Tengsu Into Three Different Versions

The air conditioning in the bento shop was strong that Wednesday noon. The engineer at the next table put down his chopsticks and suddenly said, "Do you guys know about that Japanese Tengsu? My cousin said after taking it, he felt like he'd swapped in a new battery." The salesman across from him immediately chimed in, saying a client of his had picked up two boxes while traveling in Japan. Old Chen, sitting furthest in, just smiled and said this kind of thing was better left alone—when he was younger, he'd bought a pile of bottles with similar-sounding names, and they all ended up expiring on the shelf. Three people, three versions. The main character, A-Hong, finished his bento, but the matter stuck in his mind, because he realized he couldn't tell which line was a joke and which came from someone who'd actually used it.

Back at his desk that afternoon, A-Hong wrote the three versions on paper as three lines. The first line was "taking it feels like swapping a battery." The second was "picked up while in Japan." The third was "bought it and let it expire." He stared at these three lines for a long time and noticed they had one thing in common: none of them had a source. Who did the cousin hear it from? Which kind did the client bring back? What exactly did Old Chen buy back then? With three question marks lined up together, he suddenly felt this wasn't a problem with health supplements—it was that his own way of listening was too loose.

Before leaving work, he went to the break room to fill his water and ran into Xiao-Cai from the same department. Xiao-Cai was a few years younger and had yet another version: he said this kind of thing was discussed a lot online—some people said you had to buy the Japanese original, some said it was also being sold in Taiwan, and others said you had to read the ingredients on the packaging carefully. "But you know what? Last time I saw someone share it in a community group, the comments turned into a huge argument, and in the end nobody actually explained what the real difference was." Xiao-Cai laughed after saying this and admitted he'd only seen it while scrolling on his phone. A-Hong noted this down too and filed it under "there's discussion, but no conclusion."

That evening at home, A-Hong spread the three versions out on the dining table and decided to break them down one by one. He first looked into the "feels like swapping a battery" claim and found that this kind of description was very common in supplement discussions, yet almost impossible to match to any concrete information, because it described a feeling, not an ingredient, and not a label. He told himself: feelings can be a reference, but they can't be the starting point for judgment. Next he looked into "brought back from Japan." This one was more concrete—at least it involved a source and packaging—but which kind was brought back, what the label said, and how long the shelf life was—those were the parts that could actually be verified.

When he got to the third line, A-Hong got stuck. He realized what he really wanted to ask wasn't "does it work," but "what exactly is this, and where do I go to see its official information?" He typed a few words into the search bar, looking for public statements and labeling information about Japanese Tengsu, not for who took it and what happened. He suddenly understood why the three versions at noon didn't add up: everyone was talking about results, but nobody had first made clear which thing they were talking about.

The next day he brought this up with Old Chen. Old Chen didn't laugh at him. Instead, he took a yellowed photocopy of a receipt from his drawer and said it was a habit he'd kept from buying things back then. "I'm not asking you to look at what I bought—I'm asking you to look at the date and product name on it." Old Chen said many arguments actually start from "not knowing which box you're talking about." Only then did A-Hong notice that besides the product name, the paper also had the place and time of purchase—clues that could be verified, rather than someone repeating what someone else said.

On the weekend, A-Hong accompanied his mother to the community pharmacy to pick up her chronic illness medication, and casually asked the pharmacist at the counter: if a household has both prescription drugs and health supplements, how should they be organized so things don't get messy? The pharmacist didn't answer about any specific product, only said you could first make a list of everything currently being taken, including product names, sources, and label information, then bring it in for a professional to look at. The pharmacist also reminded him that some things are prescription drugs and some are foods, and the labeling and access methods differ between the two. Confirming which category what you have falls into is more important than rushing to compare what others say. A-Hong copied this sentence into his phone memo and felt it was more solid than all three versions from noon.

That night, A-Hong rewrote the three lines on the paper. The first line became "someone described a feeling, but there's no labeling basis." The second became "source and packaging can be checked." The third became "bought it and didn't use it—a matter of storage and need." He didn't reach any conclusion about whether this thing was good or bad, but he arrived at a clearer question: next time someone talks it up like it's miraculous, he'll first ask which item they're talking about, where it came from, and what's written on the packaging. The three men's versions still had no overlap, but A-Hong already knew he didn't need any one version to feel at ease. He folded the paper and put it in his drawer, deciding that whenever a similar topic came up in the future, he'd break it down with the same method first.