Method of production of modified conjugated diene-based rubber

A method of production of modified conjugated diene-based rubber, comprising:

• a first step of using, as a polymerization initiator, an alkali metalated aromatic compound which has three or more carbon atoms which are directly bonded to alkali metal atoms and aromatic rings in one molecule so as to polymerize a monomer which contains at least a conjugated diene compound and obtain a conjugated diene-based rubber which has active ends;
• and
• a second step of reacting a compound of the following formula (I) with the active ends of said conjugated diene-based rubber which has active ends,
• wherein, in the formula (I), any one of R1 and R10 to R18 is an atom or reactive group which can react with the active ends of said conjugated diene-based rubber which has active ends or a hydrocarbon group which contains one of either said atom or said reactive group, while the remaining among R1 and R10 to R18 are respectively independently a hydrogen atom, C1 to C10 alkyl group, or C6 to C12 aryl group, R2 to R9 are respectively independently a hydrogen atom, C1 to C10 alkyl group, or C6 to C12 aryl group, “j”, “k”, “m”, and “n” are respectively independently integers of 0 to 100.