According to Tech-On, the COMS BP "is a small electric vehicle that uses bio plastics derived from plants for some of its body parts, including the hood, pillars and roof." So, for some very specific applications, this would be the ideal eco-car (well, eco-vehicle at least). It looks like it has space for at least some luggage there in the back. No more details (battery type, range, etc.) are mentioned at Tech-On.
TAB's other concept cars include a vehicle designed for on-the-go pet trimming (I'm not kidding, it's the Mobile Trimmer, and is "equipped with facilities for trimming and shampooing"), a five-seat living room van (the VOXY) and a motorcycle-carrying HIACE Wide Super GL
There's nothing official from TMC on these concepts so far (and I'm unfamiliar with Tech-on), but we're keeping our ears open. Toyota's "real" Tokyo vehicles are as follows: