Tesla, Inc’s (NASDAQ:TSLA) latest push into Japan isn't just about service centers and Superchargers — it's a reminder of something the market may be underestimating: not all EV growth is created equal for suppliers.



Because while Tesla scales, companies like Panasonic Holdings Corp (OTC:PCRFF) scale with it. And while BYD Co., Ltd. (OTC:BYDDF) (OTC:BYDDY) grows even faster, Panasonic doesn't.



That asymmetry is easy to miss — but hard to ignore once you see it.



<h2>Tesla Growth Flows Through Panasonic</h2>



Tesla still runs on a hybrid battery model.



Even as it builds in-house capacity, it continues to rely heavily on partners — Panasonic remains its “biggest strategic supplier” (per Tesla CEO Elon Musk) of high-performance cylindrical cells, especially in North America. 



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<blockquote>Tesla is making a big investment in Japan with service &amp; Superchargers. Many of the parts in Teslas are made in Japan. Panasonic has been our biggest strategic supplier over the past 2 decades. https://t.co/XkwdUIPeKy— Elon Musk (@elonmusk) March 30, 2026</blockquote>
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The two companies have spent years co-investing and scaling production together, creating deep operational ties.



So when Tesla expands — whether it's vehicles, infrastructure, or new markets like Japan — battery demand rises, and Panasonic participates directly, making it a leveraged play on Tesla's growth.



According to Nikkei Asia, Austin, Texas-based Tesla plans to double the number of its service centers in Japan to more than 30 in 2026.



<h2>The Gap Investors May Be Missing</h2>



BYD is a different story.



The company is vertically integrated, producing its own batteries — including its Blade battery — and even supplying cells to others. That makes it largely independent of third-party suppliers like Panasonic.



In fact, in some cases, BYD competes directly with Panasonic in the battery value chain, limiting any indirect upside.



The EV narrative is often framed as Tesla vs. BYD — which company sells more, which company grows faster.



But for Osaka, Japan-based Panasonic, the equation is simpler: every Tesla sold can drive revenue, but every BYD sold doesn't. 



Image: Shutterstock

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Tesla's expansion into Japan highlights its reliance on Panasonic for battery supply, contrasting with BYD's self-sufficiency. While Tesla's growth boosts Panasonic's revenue through increased battery demand, BYD's vertical integration limits its dependence on third-party suppliers, including Panasonic. This difference in supplier dynamics may be overlooked by investors, as Tesla's growth directly benefits Panasonic, while BYD's growth does not.

- Tesla's expansion into Japan includes significant investments in service centers and Superchargers, highlighting the importance of strategic suppliers like Panasonic, which remains crucial for Tesla's battery needs.  
- Panasonic, having co-invested with Tesla over two decades, benefits from increased battery demand as Tesla grows, unlike BYD, which produces its own batteries and competes with Panasonic.  
- The differentiation between Tesla's and BYD's business models illustrates that while BYD's growth is notable, Panasonic captures revenue directly from Tesla's sales, making their market relationship distinct.

Tesla Needs Panasonic, BYD Doesn't — That Gap May Matter More Than You Think