I hear that the world record of weekly sub-3 in a row is 28 weeks achieved by Mr. K. C. in Tokyo, Japan. Do you know anybody else achieved longer weekly sub-3 in a row?

The status of consecutive 17-week sub-3 is below table. in this 17 weeks, I achieved 22 sub-3s. And I ran 37 Full-Marathons and 2 Ultra-Marathons.

Today, I ran Tokyo Marathon in Tokyo., and my net time was 2:51:24. The course was very flat and is one of fast courses. But I have spring allergy these days, so I could not achieve PR. The participant number for Full Marathon was ~36,000.
As I achieved sub-3 today, I achieved 17 consecutive week sub-3 as I mentioned previously.

Below are things I got after Tokyo Marathon.
A medal for Tokyo marathon finisher:

And I completed all of 6 World Marathon Majors (Boston, New York, Chicago, Berlin, London, and Tokyo) today. They gave me a special medal as 6 star finisher.

Comparison of medal size:

Pin badge of 6 star finisher:

Space blanked after finish:

Finisher towel after finish:

Foods and sports drinks after finish (they gave me a bottle of water and a banana as well, but I ate them before taking pictures...):

Fleece and poncho for the runners who did not check their baggage:

Today I ran full-marathon in Challenge 2020 1147th day. Pictures and articles are posted by organizer in below link.
https://www.facebook.com/c2020marathon/posts/1982562135395168
(In Japanese only. Sorry...)

Today I ran full-marathon in Challenge 2020 1144th day. Pictures and articles are posted by organizer in below link.

https://www.facebook.com/c2020marathon/posts/1980515225599859
(In Japanese only. Sorry...)

And I forgot to update my running in Challenge 2020 1141st day. Pictures and articles are posted in below link.

https://www.facebook.com/c2020marathon/posts/1978624435788938

Today, I ran Yokohama Umino Koen Marathon in Yokohama city in Kanagawa Pref., and my time was 2:50:28. About half of the course was stone paving which is bad to feet and legs. The participant number for Full Marathon was ~50. The total participant number was ~500.

As I achieved sub-3 today, I achieved 16 consecutive week sub-3 as I mentioned previously, and this is 21st sub-3 in these 16 weeks. This is amazing!!!

Below pictures are sights of the event and the park.

Below is a map of today's course.

In these 3 days, I ran Kanagawa Kao Marathon in Yokohama on Feb/10th, Hiratsuka-Enoshima Fullnic on Feb/11th, and ShinYokohama Tsurumigawa Winter Marathon in Yokohama on Feb/12th. The time of today's Marathon is 2:57:30. I achieve 16th consecutive week sub-3.

Below is a scenery of  ShinYokohama Tsurumigawa Winter Marathon. It's a small event. Total participants would be ~500 for Full Marathon, Half Marathon, 30 km, 15 km, and 10 km.

Below figures are GPS tracks on Kanagawa Kao Marathon in Yokohama, Hiratsuka-Enoshima Fullnic, and ShinYokohama Tsurumigawa Winter Marathon in Yokohama.

 

Today I ran full-marathon in Challenge 2020 1133th day. My time was 2:58:21. Pictures and articles are posted by organizer in below link.

https://www.facebook.com/c2020marathon/posts/1974073879577327
(In Japanese only. Sorry...)

As I achieved sub-3 today, I achieved 15 consecutive week sub-3 as I mentioned previously. This is amazing!!! 
And this was my 270th Full Marathon, and 70th sub-3.

Yesterday and Today, I ran New Takebashi Marathon around Kokyo in Tokyo, and Arakawa Kasenjiki Horikiribashi Marathon. The time of today's Marathon is 2:57:13. This is 18th sub-3 in these 14 consecutive week sub-3.

Below is a scenery of Arakawa Kasenjiki Horikiribashi Marathon. It's a small event. Total participants would be ~300 for Full Marathon, Half Marathon, 30 km, 15 km, 10 km, and 5 km.

Below is a participation award. It's an air freshener and a bath additive made by bamboo charcoal.