Upright Piano
Yamaha U1
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The Yamaha U1A is a late-production-run (circa 1983-1988) Japanese-made U1 upright piano - the last batch built before Yamaha moved production to Indonesia, assembled in the same factory as the flagship CFX concert grand, and widely regarded as the benchmark against which other uprights are judged.
About the Yamaha U1
At 121cm tall, 153cm wide and 62cm deep and weighing 228kg, the U1 is built around a solid spruce soundboard with a surface area of 2137 square inches and notched ribs for added strength and resonance, spruce back posts, a two-piece separated bridge and Yamaha's V-Pro vacuum-shield-mold-process frame. The 88-key action runs with soft, muffler (practice) and sustain pedals, a slow-closing fallboard with a lid lock, and single caster wheels. The U1A designation refers specifically to the production run from roughly 1983 to 1988 - the final batch of U1 pianos built in Japan before manufacturing shifted to Indonesia, assembled in the same factory responsible for Yamaha's flagship CFX concert grand. The broader U-series has since expanded into SH Silent, TransAcoustic and Disklavier ENSPIRE variants, but the U1A itself is the classic fully acoustic design from that era.
Where to buy
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Sound character of the Yamaha U1
The solid spruce soundboard with notched ribs produces a clear, balanced and surprisingly rich tone for an instrument this size, though a technician's honest assessment notes it has somewhat less tonal depth than larger siblings like the U3 simply because sound has less room to develop in a smaller cabinet.
What owners of the Yamaha U1 say
Dealer and technician assessments are consistently glowing: reliability, responsive and consistent action, clear balanced tone, excellent tuning stability, strong resale value and worldwide parts availability come up again and again. The one recurring caveat applies mainly to current new pricing - a roughly $8,000 starting point that's a real barrier for budget-conscious buyers - but that concern doesn't carry over to a used U1A from the 1980s in the same way. Among upright pianos generally, the U1 is repeatedly described as the benchmark other models get measured against, a reputation this specific late-Japan-production batch shares in full.
Playability & handling of the Yamaha U1
A piano technician's detailed review notes that on a properly regulated Yamaha, every key feels exactly the same across the whole keyboard, with bass notes carrying a touch more natural weight from the heavier hammers - exactly as expected rather than a flaw. The same review acknowledges that larger siblings like the U3 and YUS5 have more tonal depth simply because sound has more room to develop in a bigger instrument, but still rates the U1 as punching above its price point. Durability draws particular praise: even after extensive use, well-maintained units retain outstanding tone, tight tuning pins and solid structural stability, backed historically by a 10-year factory warranty. The most common used-piano issue to watch for is "bobbling" hammers from compressed felts over years of use, fixed with balance-rail shimming and capstan adjustment - described as easily fixable rather than a serious defect.
Recommended accessories & strings for the Yamaha U1
As a high-end acoustic piano, the main ongoing need is professional tuning two to four times a year and regulation every five to ten years to keep the action performing as intended. Stable room humidity helps protect the soundboard and action from swelling or cracking over the long term.
Technical data for the Yamaha U1
| Height / width / depth | 121 cm / 153 cm / 62 cm |
|---|---|
| Weight | 228 kg |
| Soundboard | Solid spruce, 2137 sq. in., notched ribs |
| Back posts | Spruce |
| Bridge | Two-piece separated construction |
| Frame | V-Pro vacuum-shield-mold process |
| Controls | 88 keys, soft/muffler/sustain pedals, slow-close fallboard with lid lock |
| Production era (U1A) | Circa 1983-1988, last Japan-built batch before production moved to Indonesia |
The history of the Yamaha U1
Yamaha's U1 offers the same manufacturing consistency as the larger U3 in a more compact size suited to home practice rooms.
About Yamaha as a manufacturer
Yamaha's instrument-making history goes back to 1887, when founder Torakusu Yamaha repaired a reed organ and decided to build better ones himself, founding the Yamaha Organ Manufacturing Company in 1889 and renaming the firm Nippon Gakki in 1897; the company's first upright piano followed in 1900 and grand piano production began in 1902. The U-series upright line represents over six decades of continuous refinement on top of that foundation, and is widely regarded as one of the most respected upright piano designs in the world. The U1A specifically marks the end of that line's Japanese production before manufacturing moved to Indonesia - built in the same factory responsible for Yamaha's flagship CFX concert grand, which helps explain why this particular production run still commands such a strong reputation decades later.