At KEIO TECHNO-MALL 2010, the Okada Laboratory exhibited a fragrance generator, which is currently under development.
(Philip Lelyveld note: fragrance "printers" have been marketing in the past, but they haven't caught on. A major problem is that the scents tend to linger, the way you know someone has been smoking from the smell in their cloths. Disney got around this in their aromatic California Soarin' ride by using materials that don't absorb scents.)
"We're currently researching this together with Keio University Hospital. Because it's known that people's olfactory capability declines with age, we'd like to check how the sense of smell changes with age. And as another application, for example, it's said that sick house syndrome affects the nose first, so we think our system could be used to diagnose that syndrome. Or there may be various other ways to use the system more simply, in regular health check-ups."