There are MSX2 machines without Kanji driver even when there's a Kanji ROM 128kB or 256kB, it's the case of the Mitsubishi ML-G30 (JIS1) and ML-TS2 (JIS1 + JIS2), of the Hitachi MB-H70 (JIS1), of the Sony HB-F500 (JIS1), HB-F900 (JIS), HB-T7 (JIS1) and HB-T600 (JIS1), of the Sanyo PHC-77 (JIS1), of the Toshiba HX-23 (JIS1), HX-23F (JIS1), HX-33 (JIS1) and HX-34 (JIS1), of the Yamaha YIS-805/128 (JIS1) and YIS-805/256 (JIS1).
Btw, the Kanji driver with BASIC commands such as CALL KANJI is available only on MSX2+ and MSXturboR machines. Some MSX2 machines (National FS-4500, FS-4600, FS-4700, FS-5000, FS-5500) have a small Kanji file besides the Kanji rom 128kB, but it's without the BASIC commands.
I guess the confusion comes from the leading role of National/Panasonic, but other companies have made the things differently. And even the Panasonic FS-A1FM does not have a small Kanji driver while having a JIS1 rom.
This is partly wrong. There's still kanji driver for MSX2. What happens is that MSX2 BASIC can't be used while kanji is active (hence no call kanji). But there's still a kanji driver so the user can use "PUT KANJI" command to print kanji text on graphics screen from a BASIC program.
Having kanji font without the kanji driver (which is 32KB) is kind of stupid. While I know this might exist, it's not that common. That's the case for the Matsushita computers you said "have a small Kanji file besides the Kanji rom 128kB, but it's without the BASIC commands". You just don't know how to use it. 
