Walking into the quiet of Chef Masa's kitchen before an evening service at Sushi Masa by Ki-setsu, you notice something that most restaurant kitchens do not have.
There is no printed menu on the pass.
Not because it has not been prepared yet. Because it does not exist. Not until the morning's delivery has been unpacked, examined, and heard.
This is Chef Masa's most enduring experiment — and unlike the dishes that emerge from his Experiments and Innovations, this one never concludes. It begins again every morning, when ingredients arrive from Toyosu Market in Japan, and it ends each evening when the last of eight guests sets down their chopsticks after 16 or more courses and two to three hours at the counter.
The Experiment Defined
Most culinary experimentation follows a recognizable arc. A chef identifies an idea, tests combinations, refines technique, and eventually arrives at a dish that can be replicated. The experiment ends. The dish enters the repertoire. The kitchen moves on.
Chef Masa's central experiment at Sushi Masa by Ki-setsu inverts this entirely.
Here, the variables are never fixed. Every morning, the Toyosu Market delivery arrives — fish sourced daily from one of Japan's most rigorously graded seafood markets — and what comes through the kitchen door on any given day is not predictable in advance. The quality of a specific fish on a Tuesday in February will not be identical to the same species on a Wednesday in March. The seasons shift at Toyosu in ways that no fixed menu can anticipate.
Chef Masa does not attempt to anticipate them. He reads them.
What arrives determines what the evening becomes. The menu at Sushi Masa by Ki-setsu changes daily because the ingredient decides first and the chef responds. There is no fixed script, no standing sequence of courses that can be rehearsed. There is only what this morning offered, and what Chef Masa's judgment — built across decades of training in Tokyo and years of service at this 8-seat counter at Level 6, Cuppage Plaza, Singapore — decides to do with it.
Why Eight Seats Is the Experiment's Foundation
To understand why this experiment is possible, you need to understand the number eight.
Sushi Masa by Ki-setsu seats 8 guests per evening. This is not a design choice made for intimacy, though intimacy is its outcome. It is the honest arithmetic of a kitchen that sources daily from Toyosu, where the quantity arriving each morning is finite and must be distributed with integrity across every course of every guest's meal.
Eight guests means Chef Masa personally prepares every dish. Not a kitchen brigade executing his vision while he oversees. His hands on every plate. His judgment applied to every course from the first to the last, for all eight people simultaneously present at the counter, for the duration of a dinner that runs Tuesday to Saturday, dinner service only, closed Mondays, private bookings available on Sundays.
The experiment requires this constraint. A hundred guests would demand a fixed menu because improvisation at that scale is logistically impossible. Eight guests makes improvisation not just possible but necessary — because with only eight people to serve, the full weight of the morning's Toyosu delivery can be honored without waste, without compromise, without reaching for a backup dish when the primary ingredient is not quite right.
At eight seats, there is no backup dish.
There is only what arrived this morning and what Chef Masa decides it can become.
What the Kitchen Looks Like When the Experiment Is Running
There is a particular quality to the kitchen at Sushi Masa by Ki-setsu during the hours between the morning delivery and the evening's first guest.
The fish has been assessed. Notes have been made — not on paper, but in the accumulation of small decisions that a chef makes when handling ingredients he has worked with for decades. The rice is being prepared. The sequence of courses is being assembled not from a template but from the logic of what arrived and what it can carry.
This is the experimental work. Not the dramatic kitchen theatre of a chef attempting something technically unprecedented. The quieter and in some ways more demanding work of building coherence from variables.
Of creating an evening that feels intentional and progressive — 16 or more courses with a beginning, a middle, and an end — from ingredients whose specific qualities were unknown until this morning.
Chef Masa often notes that the most interesting cooking happens within limits. The Toyosu delivery is the ultimate limit — it cannot be argued with, adjusted, or anticipated. It simply arrives. And everything that follows is a response.
The Results, Nightly
A dinner at Sushi Masa by Ki-setsu from $230 per person — with premium menus from $320 — is the outcome of this experiment. Guests seated at the 8-seat counter in Cuppage Plaza experience something that cannot be fully replicated on any other evening, because the morning that produced it will not occur again.
This is not a marketing claim. It is the structural reality of a kitchen that sources daily from Toyosu Market and builds its menu from what arrives. The fish that defines a Tuesday evening will be different from the fish that defines a Friday evening.
The progression of courses will shift. The connections between dishes — the echoes of flavor that move through a well-constructed omakase sequence — will be drawn from different raw material each time.
Advance booking is essential. The 8-seat counter fills weeks to months ahead, which is itself a kind of evidence. People return not to taste the same thing again but to participate in a different iteration of the same experiment — one that will not be repeated in exactly that form.
The Experiment's Deeper Argument
Kenji Nakamura has spent considerable time in Chef Masa's kitchen, documenting the techniques and philosophies that animate the recipes collected on this site. The staff meals, the bold innovations, the seasonal specials — each carries a trace of the same underlying sensibility.
But the daily Toyosu experiment at Sushi Masa by Ki-setsu is something different from any recipe that can be written down.
It is an argument about what cooking actually is. Not the execution of a fixed idea. Not the replication of a proven technique. But the ongoing act of reading what is available, responding with skill and judgment, and producing something coherent and meaningful from conditions that are never entirely within your control.
Most kitchens manage this uncertainty by reducing it — fixed menus, standardized suppliers, preparation systems designed to make each service as predictable as the last.
Chef Masa's experiment is the refusal to reduce it.
Every evening at the 8-seat counter at Level 6, Cuppage Plaza, the experiment begins again. The morning's Toyosu delivery is unpacked. The menu is assembled from what arrived. Eight guests take their seats.
And for the next two to three hours, the outcome of that morning's variables is served, one course at a time, by the hands of the chef who read them.
Sushi Masa by Ki-setsu is open for dinner Tuesday to Saturday. Mondays are closed. Private bookings are available on Sundays. The restaurant seats 8 guests per evening at Level 6, Cuppage Plaza, Singapore. Menu from $230 per person, premium menu from $320 per person. Advance reservation essential — bookings fill weeks to months in advance. Click here for Bookings.
