Kanji is a thing you can do alone, grammar is something that requires someone with a bit of english talent so you can knock questions off them and get an understandable answer from.
I thought while its been brought up i'll tell about my uniform debacle. Im not very tall, only 170cm's, if that. My partner is crime was about 190ish. First day at school we wear our own thing as the uniforms havent arrived, despite us sending our measurments ahead 2 months previous. A japanese man, a tailor i'd assume, takes out measurements, rather gingerly, not wanting to touch us or bother us. So he goes off and were told it will be a few weeks.
In a fortnight our stuff arrives, great! So we try them on.... my shirts are HUGE, fits across the shoulders but the chest is massive and it goes down halfway along my thighs. The pants are a disaster, I look like some kinda weight-loss model in my old 'fat' pants, I seem to have lose a good 2inches of height at the same time. My friend has the same deal with his shirts and his pants while fitting at the waist are about 10cms too short! So we send them back with some custom measurements...
And another 2 weeks later the pants re-arrive (we decided the shirts would just have to do). Wasting no time we get our pants off and try on our new custom tailored pants right in the reception area. Well mine is still 10cms too big around the waist and too long, and they still feel like they are made for someone of 3x my weight (the base of the pants were about 20cm in diameter, i can get the pants on while wearing my desert boots), and my mates pants look like they've been washed wrong and shrank! So we ask for them to send them back, AGAIN, and with stricter instructions and a pile of measurements.
Well they come back and still suck yet are wearable, just. So off we go in our badly fitting uniforms
Then theres the time this girl came from america and she popped a button off her top because it was too small... some of the jguy's eyes nearly popped out of their heads!