-2011- Gensenfuro 28
A waterproof membrane keypad with four large buttons:
What does 28 signify? Based on surviving user manuals and online auction listings from 2012–2015, “28” in the context of a Gensenfuro model refers to one of three things, depending on the sub-brand (likely a regional manufacturer like Takagi, Hario, or M's):
| Possible Meaning | Specification | |----------------|---------------| | Depth (cm) | 28cm water depth – a shallow, wide “half-bath” style for elderly accessibility and water conservation (common in post-2011 designs). | | Liter capacity | 280 liters (rounded to 28) – typical for a 1.2m x 1.6m tub. The “28” marks the series. | | Pipe diameter (mm) | 28mm circulation pipes – larger than standard 20mm, allowing faster heating and debris filtration. | -2011- Gensenfuro 28
However, the most accepted interpretation from Japanese ryokan (inn) equipment catalogs is: Model 28 = 28cm soaking depth + high-flow circulation. This depth is ideal for a tate-furo (upright soaking position), common in urban Japanese apartments where full-length stretching is impossible.
The hyphens suggest a catalog or model-year separator. 2011 is not arbitrary. In Japan, 2011 was a watershed moment: A waterproof membrane keypad with four large buttons:
Thus, “-2011-” marks a transitional model year: a Gensenfuro designed for the post-disaster energy austerity, yet still luxuriously mimicking volcanic spring water.
Living up to the name "Gensenfuro" (Hot Spring Bath), the interior design of the 2011 model was curated to offer a relaxing, sanctuary-like atmosphere. What does 28 signify
Literally: Gensen = source/headwater (of a hot spring); Furo = Japanese bath.
In practice, a Gensenfuro is not a simple tub. It is a recirculating, high-performance bathroom system that:
Unlike a standard okufuro (home bath), a Gensenfuro is designed to maintain 40–42°C (104–108°F) with minimal top-up heat, reducing gas or electricity consumption by up to 30% compared to 2005-era models. The 2011 Gensenfuro series took this further with improved insulation and a “memory heat” function.
If you acquire a -2011- Gensenfuro 28 today:
