The Legend of Terry Nakamoto and the Yamaha L Four Heavenly Kings

In the history of Japanese acoustic guitars, there is a legend that is still passed down to this day. These are the four models—the "L-51," "L-52," "L-53," and "L-54"—born in 1975.

They are known as the “Yamaha L Four Heavenly Kings.”

The name “Four Heavenly Kings” has a ring to it that somehow tickles the imagination of a child. These four guitars, each exuding an overwhelming sense of individuality, possess a presence reminiscent of legendary artifacts or treasured artifacts passed down through the ages. The true charm of the “L Four Heavenly Kings” lies in the fact that each embodies a distinct concept and sound, radiating a unique and unparalleled presence.In this article, we’ll focus on the “L Four Heavenly Kings,” exploring the story behind their creation and the enduring appeal that continues to captivate people to this day.

"YAMAHA"
Yamaha is a leading Japanese musical instrument manufacturer renowned worldwide not only for guitars but also for pianos, electronic instruments, and wind and percussion instruments. Its history began in 1887 when founder Torakusu Yamaha repaired a broken organ in Hamamatsu, Shizuoka. Drawing on that experience, he succeeded in manufacturing domestically produced organs and eventually began manufacturing and selling pianos in 1900.Although the factory was converted to military production during the war, it is said that the third president, Kaichi Kawakami, continued to preserve the piano-making techniques.

Then, in 1946, immediately after the war ended, Yamaha reportedly began manufacturing acoustic guitars. Although they are said to have had a classical guitar-like structure at the time, no actual instruments or documents survive, and the details remain a mystery.

By the 1950s, the folk revival movement that had taken hold in the United States had spread across the ocean to Japan. In fact, records indicate that as early as 1952, a prototype of the “Dynamic Guitar”—a steel-stringed instrument based on the shape of a classical guitar—was being developed.

Time passed, and in the early 1960s, the “Dynamic Guitar” finally made its debut as a commercially available product. This experience would later lead to the development of the folk guitar.

YAMAHA / 1960s Dynamic Guitars No. 80
While there are various models within the Dynamic Guitar lineup, this instrument is the most luxurious of them all. Its sound features a resonance not found in modern guitars, a deep, rich tone, and beautiful, bell-like high notes. It is a masterpiece that every acoustic guitar lover should experience at least once.

Then, in October 1966, the "FG-150" and "FG-180" folk guitars, featuring original Japanese designs, were introduced. This marked the birth of the "FG Series," which laid the foundation for Japanese-made folk guitars and signaled the beginning of a legend.

YAMAHA / 1966–1967 FG-180 “Light Green Label”
This FG-180 features a pale green label known as the “Light Green Label,” found only on a very limited number of instruments produced during the very early FG era from 1966 to 1967.The top, sides, and back are constructed with extremely thin wood; while Martin guitars have a top thickness of just under 4mm, this FG-180 measures 2.8mm. This likely contributes to its overwhelming sound pressure, sense of openness, and the sparkling clarity of its high notes.

In 1968, driven by the million-selling hit “Kaettekita Yoppara” and the influx of foreign folk music, the Japanese folk boom swept the nation, and the FG series also gained significant popularity. However, the core of that popularity remained the more affordable models.

It is said that the president at the time (the fourth president, Genichi Kawakami) issued a stern challenge: “Why are our guitars so cheap (compared to foreign ones)? Don’t we have enough confidence?” and “Create a high-end model that can compete with overseas manufacturers.” Yamaha set out to develop a guitar that would meet “world-class standards” for acoustic guitars.

Thus, Terry Nakamoto—a legendary guitar designer whose name is indispensable when discussing Japanese folk guitars—took the helm and created the new high-end models: the “FG-1500,” “FG-2000,” and “FG-2500.”

*From left: "FG-1500," "FG-2000," "FG-2500"

Mr. Kawakami’s primary request for these models at the time was that they embody a “distinctly Japanese character.” During development, the team reportedly engaged in repeated trial and error, comparing the guitars to Martin and Gibson acoustic models and experimenting with changes to body styles and finishes. However, since they were unable to achieve the desired tonal changes, they concluded that “perhaps we should shift the customers’ expectations instead.” This marked the first step toward the birth of the L Series.

It is also worth noting that Takahiko Ishikawa, a leading figure in the acoustic guitar world, was involved as an advisor during this period. Originally, Terry Nakamoto would take guitars to musicians to solicit their feedback, conducting his research while incorporating their advice.For the development of the L Series, he reportedly drew on the advice of five studio musicians who used guitars professionally, had keen ears, and possessed technical skill. One of them was Takahiko Ishikawa, who was said to be able to distinguish differences in finish just by listening. Based on his feedback—such as “too much bass” and “weak tension”—further improvements were made, and development proceeded under the name “FG-3000.”

However, due to a decision based on sales strategy, that model was instead announced as a new addition to the “L Series.” This marked the birth of the first-generation model, the “L-31,” in 1974.

YAMAHA / 1976 L-31
This model was the first in the L Series. Brazilian rosewood was used for the sides and back, and abalone was used not only for the inlays but also for the body purfling and backstrip.

The "L" in the L Series stands for "Luxury."

True to its name, the top is crafted from carefully selected Ezo spruce, whose white, elegant grain accentuates its luxurious feel. Additionally, the scale length was extended from 637 mm (used in the FG series) to 651 mm, and changes were made to the internal body structure and the size of the neck joint. Through these specification updates, the L Series was born as a distinct entity, setting itself apart from the FG Series.

The sound, born from precise assembly by skilled craftsmen and a meticulous pursuit of acoustic design, captivated artists both in Japan and abroad, spreading the name “YAMAHA” across the globe on countless stages.

This is the story of how the "YAMAHA L Series" came to be.

The “L Four Heavenly Kings” are still spoken of today as YAMAHA’s finest handcrafted guitars.
These “L Four Heavenly Kings”—the L-51, L-52, L-53, and L-54—were also conceived by Terry Nakamoto.

*From a Yamaha catalog circa 1980

These four custom models were designed with distinct concepts, resulting in four distinct tonal characteristics.

Based on these four models, 23 specific customizations were made to various parts of the guitar, including design and playability.
These are top-of-the-line folk guitars crafted entirely by hand, one by one, by master luthiers using the guitar-making techniques cultivated by Yamaha.

Yamaha is said to have pioneered the custom-order culture in Japan, and establishing that culture is one of Terry Nakamoto’s achievements.

As mentioned earlier, Terry Nakamoto was designing a new guitar based on feedback from studio musicians. However, believing that this alone would not lead to sales, he actively visited concert venues to ask artists—known as “frontmen”—if they would use his guitar. Even so, the center of the stage was still dominated by overseas brands like Martin and Gibson.

Consequently, he switched to a made-to-order system—a revolutionary approach at the time—focused on “creating the sound the artist desires, rather than relying on existing models.” Although the “L-31,” a pioneer of custom models, had already been completed by then, Terry Nakamoto felt it “lacked the impact needed to impress them.” As a result, four sample guitars with completely different sounds and designs were created. These four would later become the concept behind the “L Four Heavenly Kings.”

From then on, whenever Terry Nakamoto visited an artist, he would gauge their preferences in advance and select a few of the four models to bring with him.

His drive to personally visit countless artists and continuously listen to their feedback on-site, combined with his personality—beloved by many musicians and guitar fans alike—ensures that Terry Nakamoto continues to command deep respect to this day. Had Terry Nakamoto not existed, the history of Japanese acoustic guitars would not have taken its current form.

The L-51 Custom is known as a unique presence even among the “Four Heavenly Kings of the L Series.”

While the shapes of the headstock, pickguard, and bridge are highly unique, what truly stands out is the body shape. In fact, this model features an asymmetrical design. The right half adopts a folk-style shape—slightly smaller and more compact—while the left half features a fuller shape based on the original jumbo design.As a result, the design delivers loose, weighty bass tones on the low-string side and tight, transparent treble tones on the high-string side. When creating the prototype for the L-Custom, Terry Nakamoto thought, “Wouldn’t it be nice to have a model specifically tailored for recording?” and devised this innovative asymmetrical body with sound design as the core focus.

While the decoration appears more subdued compared to the other three models, the L-51 Custom employs wood inlay, a traditional Japanese technique. This technique creates designs by combining the natural colors and textures of the wood itself; while it may not be as flashy as mother-of-pearl or Mexican shell inlays, it exudes a sense of elegance and warmth. Contrary to the bold appearance, the wood inlay gives the decoration a sense of calm.It is a fascinating model when you consider that “even the body is asymmetrical; if you look closely, the overall impression and the decoration are asymmetrical.”

While it has since become a model that captivates many fans, it is said that at the time, due to its eccentricity, it was the least popular among the “L Four Heavenly Kings.” As if to underscore this fact, it rarely appears on the market, and today it is truly worthy of being called a “phantom guitar.”

The L-52 Custom features a jumbo body inspired by the Gibson J-200.

With a jet-black body and white double pickguard... it evokes Gibson’s Everly Brothers.

This black finish is designed to appear dark brown depending on the lighting; if you look closely at the headstock, you can see a hint of the natural wood grain, allowing you to appreciate a lacquer-like beauty.

The white double pickguard. Upon closer inspection, you’ll notice that the left and right sides are asymmetrical in size, creating a unique design. While the true reason behind this design remains a mystery unless asked, considering the design of the aforementioned L-51, it’s interesting to speculate that “the contact area between the pickguard and the body is used to control the resonance of the low and high strings in the same way as the L-51.”

According to Terry Nakamoto, the sound was designed with Japanese tastes in mind, aiming for a subdued tone rather than flashiness.
It features a Tune-O-Matic bridge, delivering a crisp sound while still allowing you to fully appreciate the resonant body tone of the jumbo body.

The L-52 and the L Custom Series are often described as having a “Japanese sound,” but the L-52 is also known for being highly regarded by top international artists.

Paul Simon fell in love with its sound, placed an order for a smaller body size, and has been happily using it ever since. John Lennon took a liking to this model after seeing his guitar and ordered his own.

The L-53 Custom is the most dazzling model among the "Four Heavenly Kings" of the L Series.

As a model in the L Series, it distinguishes itself from other models by using mother-of-pearl liberally.

The soundhole and body binding feature abalone and ebony woven in a rope-like pattern, combining the seemingly contradictory elements of "boldness" and "delicacy."

In terms of sound, it was designed to produce a clear, resonant tone and is said to have been the most popular among the "Four Heavenly Kings" of the L series. However, the sound is by no means shrill; it is characterized by a rich, deep bass and a brilliant treble with delicate, granular tones that caress the ear. Its tone is so exquisite that it makes one think, "Isn’t this exactly what we mean by the beautiful sound of an acoustic guitar?"

The body back features a three-piece construction, though the early models used rosewood/ebony, while later models switched to a three-piece rosewood back. It is said that the three-piece design was not inspired by the Martin D-35 at all, but was chosen purely for its visual appeal.

This model has also been used by numerous artists, and it is well known that John Denver, a leading figure of 1970s country pop, fell so deeply in love with the L-53 that he described it as “the ideal guitar I had been searching for.”

Last but not least is the L-54 Custom, featuring an elegantly carved pickguard.

The body shape adopts what Yamaha calls the “Western” style.It was created based on the idea that, when considering the L Custom lineup, “we also needed a model that took the Dreadnought as a reference.” Since simplifying the design with this shape would make it too Martin-like, they consciously aimed for a Gibson-style aesthetic reminiscent of the Hummingbird or Dove. This “Martin sound, Gibson design” finish was reportedly a classic arrangement favored by Terry Nakamoto.

Next, let’s focus on the design. The cuckoo, which serves as the motif for the pickguard’s engraving, is deeply rooted in Japanese culture and is frequently used in the designs of waka poetry, paintings, and crafts.The cuckoo is beloved as a bird that heralds summer and is also a familiar summer seasonal word. With that in mind, if you look at the pickguard, you’ll notice a color scheme—blue, white, orange, and green—that evokes summer. At first glance, it brings to mind Gibson’s Hummingbird or Dove, but you can see that it has been crafted into a guitar that masterfully expresses Japanese sensibilities and beauty.

Like the L-53, the headstock and body of the L-54 feature rope-like inlays of abalone and ebony.
Looking at the headstock, it feels as though you are viewing mother-of-pearl inlay rather than mere guitar decoration.
It would be no exaggeration to call this a work of art.

The “Four Heavenly Kings of the L Series”: Their individual personalities, tonal characteristics, and designs.In this column, we have explored the journey leading up to their creation, their design philosophy, and the appeal of each model. Terry Nakamoto’s curiosity and drive, his dialogue with studio musicians and artists, and the meticulous handiwork of skilled craftsmen. And the musicians who have used them as their tools of the trade, along with the acoustic guitar fans who have passed these stories down. All of these elements have shaped the value of the “L Four Heavenly Kings,” and they continue to captivate countless people to this day.

Every time we encounter the stories embedded in each individual guitar, we are reminded of the profound depth of the instrument and the rich history of the acoustic guitar. We at Advance Guitars do not merely observe these stories; we aim to weave them into the future. So that the brilliance of the "L Four Heavenly Kings" will reach guitarists 100 years from now without fading.

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