The band formed in 2004 in Kobe, Japan.
Originally consisted of 4 members; (Vocals, Guitar, Bass, and Drums) played shows and hosted their own events based in Kobe.
In 2007, they participated in a V.A named "Rice or Bread" and started playing shows out of their home towns. At the end of the year, leaving the youngest member Leighton on bass as the other members left the band. Mean while a new guitarist and drummer joined the band as Leighton became the bass vocals; they kicked off their new start as a three piece band. In 2008, many people gave their attentions for TOY LET being one of the youngest thrash hardcore bands in Kobe at the average age of 20 (at that time). They've actively done many tour supports of different bands and gradually widened their activity. At the end of 2008, they've participated in the "MAGMA JAPAN TOUR 2008" as one of the tour supporting bands for THE NEW YORK DOLLS, BIOHAZARD, and HARLEY’S WAR at ZEPP OSAKA. At the same time they signed to KON (record label). In 2009 March, they went on their first overseas tour (Korea) not limiting their activities to only Japan.
In Sept.2009, they have took part in MAGMA 09' as one of the tour supports of THE EXPLOITED, G.B.H, DISCHARGE, and Harley's War.
At the same time they have brought Harley's War (from Cro-Mags) to their home town Kobe to play in their event REDUCE POVERTY! "KEEP TOY LETs CLEAN". They have participated in the V.A "KNOW FUTURE" organized by TIGHT RECORDS released in January 2010. On the same month they have started their own record label "TOY LEtCORDS" and have released the first EP(V.A) "VAGINERS-JAPAN TRIBUTE/COMP" including a total of 17 bands from all over Japan plus bands from overseas. This was their first official record that has been distributed in record stores all over Japan.
Nov. 2010, they have released a split CD with Harley's War (CRO-MAGS) "TOY LET x HARLEY'S WAR"